diff --git a/CMakeLists.txt b/CMakeLists.txt
index 4d8d7cc94..56392b083 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -341,7 +341,7 @@ set(GNSSSDR_MATIO_MIN_VERSION "1.5.3")
 set(GNSSSDR_GFLAGS_LOCAL_VERSION "2.2.1")
 set(GNSSSDR_GLOG_LOCAL_VERSION "0.3.5")
 set(GNSSSDR_ARMADILLO_LOCAL_VERSION "unstable")
-set(GNSSSDR_GTEST_LOCAL_VERSION "1.8.0")
+set(GNSSSDR_GTEST_LOCAL_VERSION "1.8.1")
 set(GNSSSDR_GNSS_SIM_LOCAL_VERSION "master")
 set(GNSSSDR_GPSTK_LOCAL_VERSION "2.10")
 set(GNSSSDR_MATIO_LOCAL_VERSION "1.5.12")
diff --git a/README.md b/README.md
index 9fe634565..9e2e71712 100644
--- a/README.md
+++ b/README.md
@@ -229,10 +229,10 @@ $ sudo ldconfig
 #### Build the [Google C++ Testing Framework](https://github.com/google/googletest "Googletest Homepage"), also known as Google Test:
 
 ~~~~~~
-$ wget https://github.com/google/googletest/archive/release-1.8.0.zip
-$ unzip release-1.8.0.zip
-$ cd googletest-release-1.8.0
-$ cmake -DBUILD_GTEST=ON -DBUILD_GMOCK=OFF .
+$ wget https://github.com/google/googletest/archive/release-1.8.1.zip
+$ unzip release-1.8.1.zip
+$ cd googletest-release-1.8.1
+$ cmake -DINSTALL_GTEST=OFF -DBUILD_GMOCK=OFF .
 $ make
 ~~~~~~
 
diff --git a/src/algorithms/PVT/libs/rtklib_solver.cc b/src/algorithms/PVT/libs/rtklib_solver.cc
index 15a95cdf2..4d43c18b4 100644
--- a/src/algorithms/PVT/libs/rtklib_solver.cc
+++ b/src/algorithms/PVT/libs/rtklib_solver.cc
@@ -571,10 +571,32 @@ bool rtklib_solver::get_PVT(const std::map<int, Gnss_Synchro>& gnss_observables_
                                     d_dump_file.write(reinterpret_cast<char*>(&tmp_double), sizeof(double));
 
                                     // ECEF POS X,Y,X [m] + ECEF VEL X,Y,X [m/s] (6 x double)
-                                    d_dump_file.write(reinterpret_cast<char*>(&pvt_sol.rr[0]), sizeof(pvt_sol.rr));
+                                    tmp_double = pvt_sol.rr[0];
+                                    d_dump_file.write(reinterpret_cast<char*>(&tmp_double), sizeof(double));
+                                    tmp_double = pvt_sol.rr[1];
+                                    d_dump_file.write(reinterpret_cast<char*>(&tmp_double), sizeof(double));
+                                    tmp_double = pvt_sol.rr[2];
+                                    d_dump_file.write(reinterpret_cast<char*>(&tmp_double), sizeof(double));
+                                    tmp_double = pvt_sol.rr[3];
+                                    d_dump_file.write(reinterpret_cast<char*>(&tmp_double), sizeof(double));
+                                    tmp_double = pvt_sol.rr[4];
+                                    d_dump_file.write(reinterpret_cast<char*>(&tmp_double), sizeof(double));
+                                    tmp_double = pvt_sol.rr[5];
+                                    d_dump_file.write(reinterpret_cast<char*>(&tmp_double), sizeof(double));
 
-                                    //  position variance/covariance (m^2) {c_xx,c_yy,c_zz,c_xy,c_yz,c_zx} (6 x double)
-                                    d_dump_file.write(reinterpret_cast<char*>(&pvt_sol.qr[0]), sizeof(pvt_sol.qr));
+                                    // position variance/covariance (m^2) {c_xx,c_yy,c_zz,c_xy,c_yz,c_zx} (6 x double)
+                                    tmp_double = pvt_sol.qr[0];
+                                    d_dump_file.write(reinterpret_cast<char*>(&tmp_double), sizeof(double));
+                                    tmp_double = pvt_sol.qr[1];
+                                    d_dump_file.write(reinterpret_cast<char*>(&tmp_double), sizeof(double));
+                                    tmp_double = pvt_sol.qr[2];
+                                    d_dump_file.write(reinterpret_cast<char*>(&tmp_double), sizeof(double));
+                                    tmp_double = pvt_sol.qr[3];
+                                    d_dump_file.write(reinterpret_cast<char*>(&tmp_double), sizeof(double));
+                                    tmp_double = pvt_sol.qr[4];
+                                    d_dump_file.write(reinterpret_cast<char*>(&tmp_double), sizeof(double));
+                                    tmp_double = pvt_sol.qr[5];
+                                    d_dump_file.write(reinterpret_cast<char*>(&tmp_double), sizeof(double));
 
                                     // GEO user position Latitude [deg]
                                     tmp_double = get_latitude();
@@ -592,15 +614,16 @@ bool rtklib_solver::get_PVT(const std::map<int, Gnss_Synchro>& gnss_observables_
                                     d_dump_file.write(reinterpret_cast<char*>(&pvt_sol.stat), sizeof(uint8_t));
                                     // RTKLIB solution type (0:xyz-ecef,1:enu-baseline)
                                     d_dump_file.write(reinterpret_cast<char*>(&pvt_sol.type), sizeof(uint8_t));
-                                    //AR ratio factor for validation
-                                    tmp_double = pvt_sol.ratio;
+                                    // AR ratio factor for validation
                                     d_dump_file.write(reinterpret_cast<char*>(&pvt_sol.ratio), sizeof(float));
-                                    //AR ratio threshold for validation
-                                    tmp_double = pvt_sol.thres;
+                                    // AR ratio threshold for validation
                                     d_dump_file.write(reinterpret_cast<char*>(&pvt_sol.thres), sizeof(float));
 
                                     // GDOP / PDOP/ HDOP/ VDOP
-                                    d_dump_file.write(reinterpret_cast<char*>(&dop_[0]), sizeof(double) * 4);
+                                    d_dump_file.write(reinterpret_cast<char*>(&dop_[0]), sizeof(double));
+                                    d_dump_file.write(reinterpret_cast<char*>(&dop_[1]), sizeof(double));
+                                    d_dump_file.write(reinterpret_cast<char*>(&dop_[2]), sizeof(double));
+                                    d_dump_file.write(reinterpret_cast<char*>(&dop_[3]), sizeof(double));
                                 }
                             catch (const std::ifstream::failure& e)
                                 {
diff --git a/src/algorithms/input_filter/adapters/CMakeLists.txt b/src/algorithms/input_filter/adapters/CMakeLists.txt
index f12efd609..765789e51 100644
--- a/src/algorithms/input_filter/adapters/CMakeLists.txt
+++ b/src/algorithms/input_filter/adapters/CMakeLists.txt
@@ -37,6 +37,10 @@ include_directories(
      ${VOLK_INCLUDE_DIRS}
 )
 
+if(${PC_GNURADIO_RUNTIME_VERSION} VERSION_GREATER "3.7.13.4" )
+     add_definitions( -DGR_GREATER_38=1 )
+endif(${PC_GNURADIO_RUNTIME_VERSION} VERSION_GREATER "3.7.13.4" )
+
 file(GLOB INPUT_FILTER_ADAPTER_HEADERS "*.h")
 list(SORT INPUT_FILTER_ADAPTER_HEADERS)
 add_library(input_filter_adapters ${INPUT_FILTER_ADAPTER_SOURCES} ${INPUT_FILTER_ADAPTER_HEADERS})
diff --git a/src/algorithms/input_filter/adapters/fir_filter.h b/src/algorithms/input_filter/adapters/fir_filter.h
index 05c494b5f..207d8e174 100644
--- a/src/algorithms/input_filter/adapters/fir_filter.h
+++ b/src/algorithms/input_filter/adapters/fir_filter.h
@@ -43,8 +43,12 @@
 #include <gnuradio/blocks/float_to_char.h>
 #include <gnuradio/blocks/float_to_complex.h>
 #include <gnuradio/blocks/float_to_short.h>
+#ifdef GR_GREATER_38
+#include <gnuradio/filter/fir_filter_blk.h>
+#else
 #include <gnuradio/filter/fir_filter_ccf.h>
 #include <gnuradio/filter/fir_filter_fff.h>
+#endif
 #include <cmath>
 #include <string>
 #include <vector>
diff --git a/src/algorithms/input_filter/adapters/freq_xlating_fir_filter.h b/src/algorithms/input_filter/adapters/freq_xlating_fir_filter.h
index 804e09995..8f69efc97 100644
--- a/src/algorithms/input_filter/adapters/freq_xlating_fir_filter.h
+++ b/src/algorithms/input_filter/adapters/freq_xlating_fir_filter.h
@@ -36,9 +36,13 @@
 #include "gnss_block_interface.h"
 #include "short_x2_to_cshort.h"
 #include "complex_float_to_complex_byte.h"
+#ifdef GR_GREATER_38
+#include <gnuradio/filter/freq_xlating_fir_filter.h>
+#else
 #include <gnuradio/filter/freq_xlating_fir_filter_ccf.h>
 #include <gnuradio/filter/freq_xlating_fir_filter_fcf.h>
 #include <gnuradio/filter/freq_xlating_fir_filter_scf.h>
+#endif
 #include <gnuradio/blocks/file_sink.h>
 #include <gnuradio/blocks/complex_to_float.h>
 #include <gnuradio/blocks/char_to_short.h>
diff --git a/src/algorithms/input_filter/adapters/pulse_blanking_filter.h b/src/algorithms/input_filter/adapters/pulse_blanking_filter.h
index 0d9d17cb4..87f8c4994 100644
--- a/src/algorithms/input_filter/adapters/pulse_blanking_filter.h
+++ b/src/algorithms/input_filter/adapters/pulse_blanking_filter.h
@@ -35,7 +35,11 @@
 #include "gnss_block_interface.h"
 #include "pulse_blanking_cc.h"
 #include <gnuradio/blocks/file_sink.h>
+#ifdef GR_GREATER_38
+#include <gnuradio/filter/freq_xlating_fir_filter.h>
+#else
 #include <gnuradio/filter/freq_xlating_fir_filter_ccf.h>
+#endif
 #include <string>
 
 class ConfigurationInterface;
diff --git a/src/algorithms/resampler/adapters/CMakeLists.txt b/src/algorithms/resampler/adapters/CMakeLists.txt
index 886ad5487..7c3dc92a5 100644
--- a/src/algorithms/resampler/adapters/CMakeLists.txt
+++ b/src/algorithms/resampler/adapters/CMakeLists.txt
@@ -32,9 +32,9 @@ include_directories(
 )
 
 
-if(${PC_GNURADIO_RUNTIME_VERSION} VERSION_GREATER "3.7.15" )
+if(${PC_GNURADIO_RUNTIME_VERSION} VERSION_GREATER "3.7.13.4" )
      add_definitions( -DGR_GREATER_38=1 )
-endif(${PC_GNURADIO_RUNTIME_VERSION} VERSION_GREATER "3.7.15" )
+endif(${PC_GNURADIO_RUNTIME_VERSION} VERSION_GREATER "3.7.13.4" )
 
 
 file(GLOB RESAMPLER_ADAPTER_HEADERS "*.h")
diff --git a/src/core/receiver/CMakeLists.txt b/src/core/receiver/CMakeLists.txt
index 46a13614e..c135cb0c0 100644
--- a/src/core/receiver/CMakeLists.txt
+++ b/src/core/receiver/CMakeLists.txt
@@ -98,9 +98,9 @@ if(ENABLE_AD9361)
     set(OPT_RECEIVER_INCLUDE_DIRS ${OPT_RECEIVER_INCLUDE_DIRS} ${IIO_INCLUDE_DIRS})
 endif(ENABLE_AD9361)
 
-if(${PC_GNURADIO_RUNTIME_VERSION} VERSION_GREATER "3.7.15" )
+if(${PC_GNURADIO_RUNTIME_VERSION} VERSION_GREATER "3.7.13.4" )
      add_definitions( -DGR_GREATER_38=1 )
-endif(${PC_GNURADIO_RUNTIME_VERSION} VERSION_GREATER "3.7.15" )
+endif(${PC_GNURADIO_RUNTIME_VERSION} VERSION_GREATER "3.7.13.4" )
 
 
 include_directories(
diff --git a/src/tests/CMakeLists.txt b/src/tests/CMakeLists.txt
index 8ed59e572..fcde4ab50 100644
--- a/src/tests/CMakeLists.txt
+++ b/src/tests/CMakeLists.txt
@@ -55,7 +55,7 @@ if(NOT ${GTEST_DIR_LOCAL})
          GIT_TAG release-${GNSSSDR_GTEST_LOCAL_VERSION}
          SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR}/../../thirdparty/gtest/gtest-${GNSSSDR_GTEST_LOCAL_VERSION}
          BINARY_DIR ${CMAKE_CURRENT_BINARY_DIR}/../../gtest-${GNSSSDR_GTEST_LOCAL_VERSION}
-         CMAKE_ARGS ${GTEST_COMPILER} -DBUILD_GTEST=ON -DBUILD_GMOCK=OFF ${TOOLCHAIN_ARG}
+         CMAKE_ARGS ${GTEST_COMPILER} -DINSTALL_GTEST=OFF -DBUILD_GMOCK=OFF ${TOOLCHAIN_ARG}
          UPDATE_COMMAND ""
          PATCH_COMMAND ""
          INSTALL_COMMAND ""
@@ -67,7 +67,7 @@ if(NOT ${GTEST_DIR_LOCAL})
          GIT_TAG release-${GNSSSDR_GTEST_LOCAL_VERSION}
          SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR}/../../thirdparty/gtest/gtest-${GNSSSDR_GTEST_LOCAL_VERSION}
          BINARY_DIR ${CMAKE_CURRENT_BINARY_DIR}/../../gtest-${GNSSSDR_GTEST_LOCAL_VERSION}
-         CMAKE_ARGS ${GTEST_COMPILER} -DBUILD_GTEST=ON -DBUILD_GMOCK=OFF ${TOOLCHAIN_ARG}
+         CMAKE_ARGS ${GTEST_COMPILER} -DINSTALL_GTEST=OFF -DBUILD_GMOCK=OFF ${TOOLCHAIN_ARG}
          UPDATE_COMMAND ""
          PATCH_COMMAND ""
          BUILD_BYPRODUCTS ${CMAKE_CURRENT_BINARY_DIR}/../../gtest-${GNSSSDR_GTEST_LOCAL_VERSION}/googletest/${CMAKE_FIND_LIBRARY_PREFIXES}gtest${CMAKE_STATIC_LIBRARY_SUFFIX}
@@ -136,6 +136,10 @@ if(Boost_VERSION LESS 105000)
      add_definitions(-DOLD_BOOST=1)
 endif(Boost_VERSION LESS 105000)
 
+if(${PC_GNURADIO_RUNTIME_VERSION} VERSION_GREATER "3.7.13.4" )
+     add_definitions( -DGR_GREATER_38=1 )
+endif(${PC_GNURADIO_RUNTIME_VERSION} VERSION_GREATER "3.7.13.4" )
+
 if(OPENSSL_FOUND)
     add_definitions( -DUSE_OPENSSL_FALLBACK=1 )
 endif(OPENSSL_FOUND)
diff --git a/src/tests/unit-tests/signal-processing-blocks/acquisition/galileo_e1_pcps_8ms_ambiguous_acquisition_gsoc2013_test.cc b/src/tests/unit-tests/signal-processing-blocks/acquisition/galileo_e1_pcps_8ms_ambiguous_acquisition_gsoc2013_test.cc
index 6cf6b2928..edc2eb3ce 100644
--- a/src/tests/unit-tests/signal-processing-blocks/acquisition/galileo_e1_pcps_8ms_ambiguous_acquisition_gsoc2013_test.cc
+++ b/src/tests/unit-tests/signal-processing-blocks/acquisition/galileo_e1_pcps_8ms_ambiguous_acquisition_gsoc2013_test.cc
@@ -35,7 +35,11 @@
 #include <gnuradio/top_block.h>
 #include <gnuradio/blocks/file_source.h>
 #include <gnuradio/analog/sig_source_waveform.h>
+#ifdef GR_GREATER_38
+#include <gnuradio/analog/sig_source.h>
+#else
 #include <gnuradio/analog/sig_source_c.h>
+#endif
 #include <gnuradio/msg_queue.h>
 #include <gnuradio/blocks/null_sink.h>
 #include "gnss_block_interface.h"
diff --git a/src/tests/unit-tests/signal-processing-blocks/acquisition/galileo_e1_pcps_ambiguous_acquisition_gsoc2013_test.cc b/src/tests/unit-tests/signal-processing-blocks/acquisition/galileo_e1_pcps_ambiguous_acquisition_gsoc2013_test.cc
index 1e6c5c328..d5cbef8c0 100644
--- a/src/tests/unit-tests/signal-processing-blocks/acquisition/galileo_e1_pcps_ambiguous_acquisition_gsoc2013_test.cc
+++ b/src/tests/unit-tests/signal-processing-blocks/acquisition/galileo_e1_pcps_ambiguous_acquisition_gsoc2013_test.cc
@@ -35,7 +35,11 @@
 #include <gnuradio/top_block.h>
 #include <gnuradio/blocks/file_source.h>
 #include <gnuradio/analog/sig_source_waveform.h>
+#ifdef GR_GREATER_38
+#include <gnuradio/analog/sig_source.h>
+#else
 #include <gnuradio/analog/sig_source_c.h>
+#endif
 #include <gnuradio/msg_queue.h>
 #include <gnuradio/blocks/null_sink.h>
 #include "gnss_block_interface.h"
diff --git a/src/tests/unit-tests/signal-processing-blocks/acquisition/galileo_e1_pcps_ambiguous_acquisition_gsoc_test.cc b/src/tests/unit-tests/signal-processing-blocks/acquisition/galileo_e1_pcps_ambiguous_acquisition_gsoc_test.cc
index 8bf13b0a7..e0c6b4534 100644
--- a/src/tests/unit-tests/signal-processing-blocks/acquisition/galileo_e1_pcps_ambiguous_acquisition_gsoc_test.cc
+++ b/src/tests/unit-tests/signal-processing-blocks/acquisition/galileo_e1_pcps_ambiguous_acquisition_gsoc_test.cc
@@ -45,7 +45,11 @@
 #include <gnuradio/top_block.h>
 #include <gnuradio/blocks/file_source.h>
 #include <gnuradio/analog/sig_source_waveform.h>
+#ifdef GR_GREATER_38
+#include <gnuradio/analog/sig_source.h>
+#else
 #include <gnuradio/analog/sig_source_c.h>
+#endif
 #include <gnuradio/msg_queue.h>
 #include <gnuradio/blocks/null_sink.h>
 #include <gnuradio/blocks/skiphead.h>
diff --git a/src/tests/unit-tests/signal-processing-blocks/acquisition/galileo_e1_pcps_ambiguous_acquisition_test.cc b/src/tests/unit-tests/signal-processing-blocks/acquisition/galileo_e1_pcps_ambiguous_acquisition_test.cc
index 6d56fd5ad..10ed1e676 100644
--- a/src/tests/unit-tests/signal-processing-blocks/acquisition/galileo_e1_pcps_ambiguous_acquisition_test.cc
+++ b/src/tests/unit-tests/signal-processing-blocks/acquisition/galileo_e1_pcps_ambiguous_acquisition_test.cc
@@ -37,7 +37,11 @@
 #include <gnuradio/top_block.h>
 #include <gnuradio/blocks/file_source.h>
 #include <gnuradio/analog/sig_source_waveform.h>
+#ifdef GR_GREATER_38
+#include <gnuradio/analog/sig_source.h>
+#else
 #include <gnuradio/analog/sig_source_c.h>
+#endif
 #include <gnuradio/msg_queue.h>
 #include <gnuradio/blocks/null_sink.h>
 #include <gtest/gtest.h>
diff --git a/src/tests/unit-tests/signal-processing-blocks/acquisition/galileo_e1_pcps_cccwsr_ambiguous_acquisition_gsoc2013_test.cc b/src/tests/unit-tests/signal-processing-blocks/acquisition/galileo_e1_pcps_cccwsr_ambiguous_acquisition_gsoc2013_test.cc
index 25cbe9854..d2738a9a3 100644
--- a/src/tests/unit-tests/signal-processing-blocks/acquisition/galileo_e1_pcps_cccwsr_ambiguous_acquisition_gsoc2013_test.cc
+++ b/src/tests/unit-tests/signal-processing-blocks/acquisition/galileo_e1_pcps_cccwsr_ambiguous_acquisition_gsoc2013_test.cc
@@ -36,7 +36,11 @@
 #include <gnuradio/top_block.h>
 #include <gnuradio/blocks/file_source.h>
 #include <gnuradio/analog/sig_source_waveform.h>
+#ifdef GR_GREATER_38
+#include <gnuradio/analog/sig_source.h>
+#else
 #include <gnuradio/analog/sig_source_c.h>
+#endif
 #include <gnuradio/msg_queue.h>
 #include <gnuradio/blocks/null_sink.h>
 #include "gnss_block_interface.h"
diff --git a/src/tests/unit-tests/signal-processing-blocks/acquisition/galileo_e1_pcps_quicksync_ambiguous_acquisition_gsoc2014_test.cc b/src/tests/unit-tests/signal-processing-blocks/acquisition/galileo_e1_pcps_quicksync_ambiguous_acquisition_gsoc2014_test.cc
index a52ce784f..9acd50a0a 100644
--- a/src/tests/unit-tests/signal-processing-blocks/acquisition/galileo_e1_pcps_quicksync_ambiguous_acquisition_gsoc2014_test.cc
+++ b/src/tests/unit-tests/signal-processing-blocks/acquisition/galileo_e1_pcps_quicksync_ambiguous_acquisition_gsoc2014_test.cc
@@ -39,7 +39,11 @@
 #include <gnuradio/top_block.h>
 #include <gnuradio/blocks/file_source.h>
 #include <gnuradio/analog/sig_source_waveform.h>
+#ifdef GR_GREATER_38
+#include <gnuradio/analog/sig_source.h>
+#else
 #include <gnuradio/analog/sig_source_c.h>
+#endif
 #include <gnuradio/blocks/null_sink.h>
 #include "gnss_block_interface.h"
 #include "in_memory_configuration.h"
diff --git a/src/tests/unit-tests/signal-processing-blocks/acquisition/galileo_e1_pcps_tong_ambiguous_acquisition_gsoc2013_test.cc b/src/tests/unit-tests/signal-processing-blocks/acquisition/galileo_e1_pcps_tong_ambiguous_acquisition_gsoc2013_test.cc
index 531823eea..ce86126ea 100644
--- a/src/tests/unit-tests/signal-processing-blocks/acquisition/galileo_e1_pcps_tong_ambiguous_acquisition_gsoc2013_test.cc
+++ b/src/tests/unit-tests/signal-processing-blocks/acquisition/galileo_e1_pcps_tong_ambiguous_acquisition_gsoc2013_test.cc
@@ -36,7 +36,11 @@
 #include <gnuradio/top_block.h>
 #include <gnuradio/blocks/file_source.h>
 #include <gnuradio/analog/sig_source_waveform.h>
+#ifdef GR_GREATER_38
+#include <gnuradio/analog/sig_source.h>
+#else
 #include <gnuradio/analog/sig_source_c.h>
+#endif
 #include <gnuradio/msg_queue.h>
 #include <gnuradio/blocks/null_sink.h>
 #include <gtest/gtest.h>
diff --git a/src/tests/unit-tests/signal-processing-blocks/acquisition/galileo_e5a_pcps_acquisition_gsoc2014_gensource_test.cc b/src/tests/unit-tests/signal-processing-blocks/acquisition/galileo_e5a_pcps_acquisition_gsoc2014_gensource_test.cc
index 741bb0d7e..63cf64e3e 100644
--- a/src/tests/unit-tests/signal-processing-blocks/acquisition/galileo_e5a_pcps_acquisition_gsoc2014_gensource_test.cc
+++ b/src/tests/unit-tests/signal-processing-blocks/acquisition/galileo_e5a_pcps_acquisition_gsoc2014_gensource_test.cc
@@ -33,7 +33,11 @@
 #include <gnuradio/top_block.h>
 #include <gnuradio/blocks/file_source.h>
 #include <gnuradio/analog/sig_source_waveform.h>
+#ifdef GR_GREATER_38
+#include <gnuradio/analog/sig_source.h>
+#else
 #include <gnuradio/analog/sig_source_c.h>
+#endif
 #include <gnuradio/msg_queue.h>
 #include <gnuradio/blocks/null_sink.h>
 #include "gnss_block_interface.h"
diff --git a/src/tests/unit-tests/signal-processing-blocks/acquisition/glonass_l1_ca_pcps_acquisition_gsoc2017_test.cc b/src/tests/unit-tests/signal-processing-blocks/acquisition/glonass_l1_ca_pcps_acquisition_gsoc2017_test.cc
index 425c085bc..30758feac 100644
--- a/src/tests/unit-tests/signal-processing-blocks/acquisition/glonass_l1_ca_pcps_acquisition_gsoc2017_test.cc
+++ b/src/tests/unit-tests/signal-processing-blocks/acquisition/glonass_l1_ca_pcps_acquisition_gsoc2017_test.cc
@@ -35,7 +35,11 @@
 #include <gnuradio/top_block.h>
 #include <gnuradio/blocks/file_source.h>
 #include <gnuradio/analog/sig_source_waveform.h>
+#ifdef GR_GREATER_38
+#include <gnuradio/analog/sig_source.h>
+#else
 #include <gnuradio/analog/sig_source_c.h>
+#endif
 #include <gnuradio/msg_queue.h>
 #include <gnuradio/blocks/null_sink.h>
 #include <gtest/gtest.h>
diff --git a/src/tests/unit-tests/signal-processing-blocks/acquisition/glonass_l1_ca_pcps_acquisition_test.cc b/src/tests/unit-tests/signal-processing-blocks/acquisition/glonass_l1_ca_pcps_acquisition_test.cc
index 9c6574d6e..b250b7e64 100644
--- a/src/tests/unit-tests/signal-processing-blocks/acquisition/glonass_l1_ca_pcps_acquisition_test.cc
+++ b/src/tests/unit-tests/signal-processing-blocks/acquisition/glonass_l1_ca_pcps_acquisition_test.cc
@@ -37,7 +37,11 @@
 #include <gnuradio/top_block.h>
 #include <gnuradio/blocks/file_source.h>
 #include <gnuradio/analog/sig_source_waveform.h>
+#ifdef GR_GREATER_38
+#include <gnuradio/analog/sig_source.h>
+#else
 #include <gnuradio/analog/sig_source_c.h>
+#endif
 #include <gnuradio/msg_queue.h>
 #include <gnuradio/blocks/null_sink.h>
 #include <gtest/gtest.h>
diff --git a/src/tests/unit-tests/signal-processing-blocks/acquisition/glonass_l2_ca_pcps_acquisition_test.cc b/src/tests/unit-tests/signal-processing-blocks/acquisition/glonass_l2_ca_pcps_acquisition_test.cc
index d59e7992e..cf2af8a56 100644
--- a/src/tests/unit-tests/signal-processing-blocks/acquisition/glonass_l2_ca_pcps_acquisition_test.cc
+++ b/src/tests/unit-tests/signal-processing-blocks/acquisition/glonass_l2_ca_pcps_acquisition_test.cc
@@ -34,7 +34,11 @@
 #include <gnuradio/top_block.h>
 #include <gnuradio/blocks/file_source.h>
 #include <gnuradio/analog/sig_source_waveform.h>
+#ifdef GR_GREATER_38
+#include <gnuradio/analog/sig_source.h>
+#else
 #include <gnuradio/analog/sig_source_c.h>
+#endif
 #include <gnuradio/msg_queue.h>
 #include <gnuradio/blocks/null_sink.h>
 #include <gtest/gtest.h>
diff --git a/src/tests/unit-tests/signal-processing-blocks/acquisition/gps_l1_ca_pcps_acquisition_gsoc2013_test.cc b/src/tests/unit-tests/signal-processing-blocks/acquisition/gps_l1_ca_pcps_acquisition_gsoc2013_test.cc
index e323a9ad5..7fe814a5c 100644
--- a/src/tests/unit-tests/signal-processing-blocks/acquisition/gps_l1_ca_pcps_acquisition_gsoc2013_test.cc
+++ b/src/tests/unit-tests/signal-processing-blocks/acquisition/gps_l1_ca_pcps_acquisition_gsoc2013_test.cc
@@ -35,7 +35,11 @@
 #include <gnuradio/top_block.h>
 #include <gnuradio/blocks/file_source.h>
 #include <gnuradio/analog/sig_source_waveform.h>
+#ifdef GR_GREATER_38
+#include <gnuradio/analog/sig_source.h>
+#else
 #include <gnuradio/analog/sig_source_c.h>
+#endif
 #include <gnuradio/msg_queue.h>
 #include <gnuradio/blocks/null_sink.h>
 #include <gtest/gtest.h>
diff --git a/src/tests/unit-tests/signal-processing-blocks/acquisition/gps_l1_ca_pcps_acquisition_test.cc b/src/tests/unit-tests/signal-processing-blocks/acquisition/gps_l1_ca_pcps_acquisition_test.cc
index d5bfafeac..6f028cd4a 100644
--- a/src/tests/unit-tests/signal-processing-blocks/acquisition/gps_l1_ca_pcps_acquisition_test.cc
+++ b/src/tests/unit-tests/signal-processing-blocks/acquisition/gps_l1_ca_pcps_acquisition_test.cc
@@ -38,7 +38,11 @@
 #include <gnuradio/top_block.h>
 #include <gnuradio/blocks/file_source.h>
 #include <gnuradio/analog/sig_source_waveform.h>
+#ifdef GR_GREATER_38
+#include <gnuradio/analog/sig_source.h>
+#else
 #include <gnuradio/analog/sig_source_c.h>
+#endif
 #include <gnuradio/msg_queue.h>
 #include <gnuradio/blocks/null_sink.h>
 #include <gtest/gtest.h>
diff --git a/src/tests/unit-tests/signal-processing-blocks/acquisition/gps_l1_ca_pcps_acquisition_test_fpga.cc b/src/tests/unit-tests/signal-processing-blocks/acquisition/gps_l1_ca_pcps_acquisition_test_fpga.cc
index 7db3c6d52..4fba7a4b9 100644
--- a/src/tests/unit-tests/signal-processing-blocks/acquisition/gps_l1_ca_pcps_acquisition_test_fpga.cc
+++ b/src/tests/unit-tests/signal-processing-blocks/acquisition/gps_l1_ca_pcps_acquisition_test_fpga.cc
@@ -36,7 +36,11 @@
 #include <gnuradio/top_block.h>
 #include <gnuradio/blocks/file_source.h>
 #include <gnuradio/analog/sig_source_waveform.h>
+#ifdef GR_GREATER_38
+#include <gnuradio/analog/sig_source.h>
+#else
 #include <gnuradio/analog/sig_source_c.h>
+#endif
 #include <gnuradio/msg_queue.h>
 #include <gnuradio/blocks/null_sink.h>
 #include <gnuradio/blocks/throttle.h>
diff --git a/src/tests/unit-tests/signal-processing-blocks/acquisition/gps_l1_ca_pcps_opencl_acquisition_gsoc2013_test.cc b/src/tests/unit-tests/signal-processing-blocks/acquisition/gps_l1_ca_pcps_opencl_acquisition_gsoc2013_test.cc
index 48d1ed090..4ff687b66 100644
--- a/src/tests/unit-tests/signal-processing-blocks/acquisition/gps_l1_ca_pcps_opencl_acquisition_gsoc2013_test.cc
+++ b/src/tests/unit-tests/signal-processing-blocks/acquisition/gps_l1_ca_pcps_opencl_acquisition_gsoc2013_test.cc
@@ -36,7 +36,11 @@
 #include <gnuradio/top_block.h>
 #include <gnuradio/blocks/file_source.h>
 #include <gnuradio/analog/sig_source_waveform.h>
+#ifdef GR_GREATER_38
+#include <gnuradio/analog/sig_source.h>
+#else
 #include <gnuradio/analog/sig_source_c.h>
+#endif
 #include <gnuradio/msg_queue.h>
 #include <gnuradio/blocks/null_sink.h>
 #include "gnss_block_interface.h"
diff --git a/src/tests/unit-tests/signal-processing-blocks/acquisition/gps_l1_ca_pcps_quicksync_acquisition_gsoc2014_test.cc b/src/tests/unit-tests/signal-processing-blocks/acquisition/gps_l1_ca_pcps_quicksync_acquisition_gsoc2014_test.cc
index e48d9384a..2ffd1bd15 100644
--- a/src/tests/unit-tests/signal-processing-blocks/acquisition/gps_l1_ca_pcps_quicksync_acquisition_gsoc2014_test.cc
+++ b/src/tests/unit-tests/signal-processing-blocks/acquisition/gps_l1_ca_pcps_quicksync_acquisition_gsoc2014_test.cc
@@ -37,7 +37,11 @@
 #include <gnuradio/top_block.h>
 #include <gnuradio/blocks/file_source.h>
 #include <gnuradio/analog/sig_source_waveform.h>
+#ifdef GR_GREATER_38
+#include <gnuradio/analog/sig_source.h>
+#else
 #include <gnuradio/analog/sig_source_c.h>
+#endif
 #include <gnuradio/msg_queue.h>
 #include <gnuradio/blocks/null_sink.h>
 #include <gtest/gtest.h>
diff --git a/src/tests/unit-tests/signal-processing-blocks/acquisition/gps_l1_ca_pcps_tong_acquisition_gsoc2013_test.cc b/src/tests/unit-tests/signal-processing-blocks/acquisition/gps_l1_ca_pcps_tong_acquisition_gsoc2013_test.cc
index 68e23ac91..d069fd703 100644
--- a/src/tests/unit-tests/signal-processing-blocks/acquisition/gps_l1_ca_pcps_tong_acquisition_gsoc2013_test.cc
+++ b/src/tests/unit-tests/signal-processing-blocks/acquisition/gps_l1_ca_pcps_tong_acquisition_gsoc2013_test.cc
@@ -36,7 +36,11 @@
 #include <gnuradio/top_block.h>
 #include <gnuradio/blocks/file_source.h>
 #include <gnuradio/analog/sig_source_waveform.h>
+#ifdef GR_GREATER_38
+#include <gnuradio/analog/sig_source.h>
+#else
 #include <gnuradio/analog/sig_source_c.h>
+#endif
 #include <gnuradio/msg_queue.h>
 #include <gnuradio/blocks/null_sink.h>
 #include <gtest/gtest.h>
diff --git a/src/tests/unit-tests/signal-processing-blocks/acquisition/gps_l2_m_pcps_acquisition_test.cc b/src/tests/unit-tests/signal-processing-blocks/acquisition/gps_l2_m_pcps_acquisition_test.cc
index b83802008..d6cb2813c 100644
--- a/src/tests/unit-tests/signal-processing-blocks/acquisition/gps_l2_m_pcps_acquisition_test.cc
+++ b/src/tests/unit-tests/signal-processing-blocks/acquisition/gps_l2_m_pcps_acquisition_test.cc
@@ -37,7 +37,11 @@
 #include <gnuradio/top_block.h>
 #include <gnuradio/blocks/file_source.h>
 #include <gnuradio/analog/sig_source_waveform.h>
+#ifdef GR_GREATER_38
+#include <gnuradio/analog/sig_source.h>
+#else
 #include <gnuradio/analog/sig_source_c.h>
+#endif
 #include <gnuradio/blocks/interleaved_short_to_complex.h>
 #include <gnuradio/blocks/char_to_short.h>
 #include <gnuradio/msg_queue.h>
diff --git a/src/tests/unit-tests/signal-processing-blocks/filter/fir_filter_test.cc b/src/tests/unit-tests/signal-processing-blocks/filter/fir_filter_test.cc
index 51181dd2f..142802256 100644
--- a/src/tests/unit-tests/signal-processing-blocks/filter/fir_filter_test.cc
+++ b/src/tests/unit-tests/signal-processing-blocks/filter/fir_filter_test.cc
@@ -34,7 +34,11 @@
 #include <gflags/gflags.h>
 #include <gnuradio/top_block.h>
 #include <gnuradio/analog/sig_source_waveform.h>
+#ifdef GR_GREATER_38
+#include <gnuradio/analog/sig_source.h>
+#else
 #include <gnuradio/analog/sig_source_c.h>
+#endif
 #include <gnuradio/msg_queue.h>
 #include <gnuradio/blocks/null_sink.h>
 #include <gtest/gtest.h>
diff --git a/src/tests/unit-tests/signal-processing-blocks/filter/notch_filter_lite_test.cc b/src/tests/unit-tests/signal-processing-blocks/filter/notch_filter_lite_test.cc
index 8c5e02dbb..9028403bf 100644
--- a/src/tests/unit-tests/signal-processing-blocks/filter/notch_filter_lite_test.cc
+++ b/src/tests/unit-tests/signal-processing-blocks/filter/notch_filter_lite_test.cc
@@ -34,7 +34,11 @@
 #include <gflags/gflags.h>
 #include <gnuradio/top_block.h>
 #include <gnuradio/analog/sig_source_waveform.h>
+#ifdef GR_GREATER_38
+#include <gnuradio/analog/sig_source.h>
+#else
 #include <gnuradio/analog/sig_source_c.h>
+#endif
 #include <gnuradio/msg_queue.h>
 #include <gnuradio/blocks/null_sink.h>
 #include <gtest/gtest.h>
diff --git a/src/tests/unit-tests/signal-processing-blocks/filter/notch_filter_test.cc b/src/tests/unit-tests/signal-processing-blocks/filter/notch_filter_test.cc
index 9db3593a6..2010b646c 100644
--- a/src/tests/unit-tests/signal-processing-blocks/filter/notch_filter_test.cc
+++ b/src/tests/unit-tests/signal-processing-blocks/filter/notch_filter_test.cc
@@ -34,7 +34,11 @@
 #include <gflags/gflags.h>
 #include <gnuradio/top_block.h>
 #include <gnuradio/analog/sig_source_waveform.h>
+#ifdef GR_GREATER_38
+#include <gnuradio/analog/sig_source.h>
+#else
 #include <gnuradio/analog/sig_source_c.h>
+#endif
 #include <gnuradio/msg_queue.h>
 #include <gnuradio/blocks/null_sink.h>
 #include <gtest/gtest.h>
diff --git a/src/tests/unit-tests/signal-processing-blocks/filter/pulse_blanking_filter_test.cc b/src/tests/unit-tests/signal-processing-blocks/filter/pulse_blanking_filter_test.cc
index 0ca1840aa..4cff0f421 100644
--- a/src/tests/unit-tests/signal-processing-blocks/filter/pulse_blanking_filter_test.cc
+++ b/src/tests/unit-tests/signal-processing-blocks/filter/pulse_blanking_filter_test.cc
@@ -34,7 +34,11 @@
 #include <gflags/gflags.h>
 #include <gnuradio/top_block.h>
 #include <gnuradio/analog/sig_source_waveform.h>
+#ifdef GR_GREATER_38
+#include <gnuradio/analog/sig_source.h>
+#else
 #include <gnuradio/analog/sig_source_c.h>
+#endif
 #include <gnuradio/msg_queue.h>
 #include <gnuradio/blocks/null_sink.h>
 #include <gtest/gtest.h>
diff --git a/src/tests/unit-tests/signal-processing-blocks/resampler/direct_resampler_conditioner_cc_test.cc b/src/tests/unit-tests/signal-processing-blocks/resampler/direct_resampler_conditioner_cc_test.cc
index 8dc1ef42c..55c49c568 100644
--- a/src/tests/unit-tests/signal-processing-blocks/resampler/direct_resampler_conditioner_cc_test.cc
+++ b/src/tests/unit-tests/signal-processing-blocks/resampler/direct_resampler_conditioner_cc_test.cc
@@ -34,7 +34,11 @@
 #include <chrono>
 #include <gnuradio/top_block.h>
 #include <gnuradio/analog/sig_source_waveform.h>
+#ifdef GR_GREATER_38
+#include <gnuradio/analog/sig_source.h>
+#else
 #include <gnuradio/analog/sig_source_c.h>
+#endif
 #include <gnuradio/msg_queue.h>
 #include <gnuradio/blocks/null_sink.h>
 #include "gnss_sdr_valve.h"
diff --git a/src/tests/unit-tests/signal-processing-blocks/resampler/mmse_resampler_test.cc b/src/tests/unit-tests/signal-processing-blocks/resampler/mmse_resampler_test.cc
index 1292f93dc..c00561eb3 100644
--- a/src/tests/unit-tests/signal-processing-blocks/resampler/mmse_resampler_test.cc
+++ b/src/tests/unit-tests/signal-processing-blocks/resampler/mmse_resampler_test.cc
@@ -32,7 +32,11 @@
 #include <chrono>
 #include <gnuradio/top_block.h>
 #include <gnuradio/analog/sig_source_waveform.h>
+#ifdef GR_GREATER_38
+#include <gnuradio/analog/sig_source.h>
+#else
 #include <gnuradio/analog/sig_source_c.h>
+#endif
 #include <gnuradio/msg_queue.h>
 #include <gnuradio/blocks/null_sink.h>
 #include "gnss_sdr_valve.h"
diff --git a/src/tests/unit-tests/signal-processing-blocks/sources/gnss_sdr_valve_test.cc b/src/tests/unit-tests/signal-processing-blocks/sources/gnss_sdr_valve_test.cc
index 26a57621e..41c10d607 100644
--- a/src/tests/unit-tests/signal-processing-blocks/sources/gnss_sdr_valve_test.cc
+++ b/src/tests/unit-tests/signal-processing-blocks/sources/gnss_sdr_valve_test.cc
@@ -33,7 +33,11 @@
 
 #include <gnuradio/top_block.h>
 #include <gnuradio/analog/sig_source_waveform.h>
+#ifdef GR_GREATER_38
+#include <gnuradio/analog/sig_source.h>
+#else
 #include <gnuradio/analog/sig_source_f.h>
+#endif
 #include <gnuradio/blocks/null_sink.h>
 #include <gnuradio/msg_queue.h>
 #include "gnss_sdr_valve.h"
diff --git a/src/tests/unit-tests/signal-processing-blocks/sources/unpack_2bit_samples_test.cc b/src/tests/unit-tests/signal-processing-blocks/sources/unpack_2bit_samples_test.cc
index 9229f16be..68891bff0 100644
--- a/src/tests/unit-tests/signal-processing-blocks/sources/unpack_2bit_samples_test.cc
+++ b/src/tests/unit-tests/signal-processing-blocks/sources/unpack_2bit_samples_test.cc
@@ -33,9 +33,14 @@
 
 #include <gtest/gtest.h>
 #include <gnuradio/top_block.h>
+#ifdef GR_GREATER_38
+#include <gnuradio/blocks/vector_source.h>
+#include <gnuradio/blocks/vector_sink.h>
+#else
 #include <gnuradio/blocks/vector_source_b.h>
 #include <gnuradio/blocks/vector_source_s.h>
 #include <gnuradio/blocks/vector_sink_b.h>
+#endif
 #include <gnuradio/blocks/stream_to_vector.h>
 #include "unpack_2bit_samples.h"
 
diff --git a/src/tests/unit-tests/signal-processing-blocks/telemetry_decoder/gps_l1_ca_telemetry_decoder_test.cc b/src/tests/unit-tests/signal-processing-blocks/telemetry_decoder/gps_l1_ca_telemetry_decoder_test.cc
index 5f35d6014..22a1118d9 100644
--- a/src/tests/unit-tests/signal-processing-blocks/telemetry_decoder/gps_l1_ca_telemetry_decoder_test.cc
+++ b/src/tests/unit-tests/signal-processing-blocks/telemetry_decoder/gps_l1_ca_telemetry_decoder_test.cc
@@ -38,7 +38,11 @@
 #include <gnuradio/top_block.h>
 #include <gnuradio/blocks/file_source.h>
 #include <gnuradio/analog/sig_source_waveform.h>
+#ifdef GR_GREATER_38
+#include <gnuradio/analog/sig_source.h>
+#else
 #include <gnuradio/analog/sig_source_c.h>
+#endif
 #include <gnuradio/blocks/interleaved_char_to_complex.h>
 #include <gnuradio/blocks/null_sink.h>
 #include <gnuradio/blocks/skiphead.h>
diff --git a/src/tests/unit-tests/signal-processing-blocks/tracking/galileo_e1_dll_pll_veml_tracking_test.cc b/src/tests/unit-tests/signal-processing-blocks/tracking/galileo_e1_dll_pll_veml_tracking_test.cc
index 55b2e80f8..fb61cd4bd 100644
--- a/src/tests/unit-tests/signal-processing-blocks/tracking/galileo_e1_dll_pll_veml_tracking_test.cc
+++ b/src/tests/unit-tests/signal-processing-blocks/tracking/galileo_e1_dll_pll_veml_tracking_test.cc
@@ -35,7 +35,11 @@
 #include <gnuradio/top_block.h>
 #include <gnuradio/blocks/file_source.h>
 #include <gnuradio/analog/sig_source_waveform.h>
+#ifdef GR_GREATER_38
+#include <gnuradio/analog/sig_source.h>
+#else
 #include <gnuradio/analog/sig_source_c.h>
+#endif
 #include <gnuradio/msg_queue.h>
 #include <gnuradio/blocks/null_sink.h>
 #include <gnuradio/blocks/skiphead.h>
diff --git a/src/tests/unit-tests/signal-processing-blocks/tracking/galileo_e5a_tracking_test.cc b/src/tests/unit-tests/signal-processing-blocks/tracking/galileo_e5a_tracking_test.cc
index 2aad4e5bd..9c6d274f7 100644
--- a/src/tests/unit-tests/signal-processing-blocks/tracking/galileo_e5a_tracking_test.cc
+++ b/src/tests/unit-tests/signal-processing-blocks/tracking/galileo_e5a_tracking_test.cc
@@ -35,7 +35,11 @@
 #include <gnuradio/top_block.h>
 #include <gnuradio/blocks/file_source.h>
 #include <gnuradio/analog/sig_source_waveform.h>
+#ifdef GR_GREATER_38
+#include <gnuradio/analog/sig_source.h>
+#else
 #include <gnuradio/analog/sig_source_c.h>
+#endif
 #include <gnuradio/msg_queue.h>
 #include <gnuradio/blocks/null_sink.h>
 #include <gnuradio/blocks/skiphead.h>
diff --git a/src/tests/unit-tests/signal-processing-blocks/tracking/glonass_l1_ca_dll_pll_c_aid_tracking_test.cc b/src/tests/unit-tests/signal-processing-blocks/tracking/glonass_l1_ca_dll_pll_c_aid_tracking_test.cc
index 34ca29f51..352c837e1 100644
--- a/src/tests/unit-tests/signal-processing-blocks/tracking/glonass_l1_ca_dll_pll_c_aid_tracking_test.cc
+++ b/src/tests/unit-tests/signal-processing-blocks/tracking/glonass_l1_ca_dll_pll_c_aid_tracking_test.cc
@@ -35,7 +35,11 @@
 #include <gnuradio/top_block.h>
 #include <gnuradio/blocks/file_source.h>
 #include <gnuradio/analog/sig_source_waveform.h>
+#ifdef GR_GREATER_38
+#include <gnuradio/analog/sig_source.h>
+#else
 #include <gnuradio/analog/sig_source_c.h>
+#endif
 #include <gnuradio/msg_queue.h>
 #include <gnuradio/blocks/null_sink.h>
 #include <gnuradio/blocks/skiphead.h>
diff --git a/src/tests/unit-tests/signal-processing-blocks/tracking/glonass_l1_ca_dll_pll_tracking_test.cc b/src/tests/unit-tests/signal-processing-blocks/tracking/glonass_l1_ca_dll_pll_tracking_test.cc
index 2afd0d444..6503e30db 100644
--- a/src/tests/unit-tests/signal-processing-blocks/tracking/glonass_l1_ca_dll_pll_tracking_test.cc
+++ b/src/tests/unit-tests/signal-processing-blocks/tracking/glonass_l1_ca_dll_pll_tracking_test.cc
@@ -35,7 +35,11 @@
 #include <gnuradio/top_block.h>
 #include <gnuradio/blocks/file_source.h>
 #include <gnuradio/analog/sig_source_waveform.h>
+#ifdef GR_GREATER_38
+#include <gnuradio/analog/sig_source.h>
+#else
 #include <gnuradio/analog/sig_source_c.h>
+#endif
 #include <gnuradio/msg_queue.h>
 #include <gnuradio/blocks/null_sink.h>
 #include <gnuradio/blocks/skiphead.h>
diff --git a/src/tests/unit-tests/signal-processing-blocks/tracking/gps_l1_ca_dll_pll_tracking_test.cc b/src/tests/unit-tests/signal-processing-blocks/tracking/gps_l1_ca_dll_pll_tracking_test.cc
index fa897a5cf..3484fc791 100644
--- a/src/tests/unit-tests/signal-processing-blocks/tracking/gps_l1_ca_dll_pll_tracking_test.cc
+++ b/src/tests/unit-tests/signal-processing-blocks/tracking/gps_l1_ca_dll_pll_tracking_test.cc
@@ -39,7 +39,11 @@
 #include <gnuradio/top_block.h>
 #include <gnuradio/blocks/file_source.h>
 #include <gnuradio/analog/sig_source_waveform.h>
+#ifdef GR_GREATER_38
+#include <gnuradio/analog/sig_source.h>
+#else
 #include <gnuradio/analog/sig_source_c.h>
+#endif
 #include <gnuradio/blocks/interleaved_char_to_complex.h>
 #include <gnuradio/blocks/null_sink.h>
 #include <gnuradio/blocks/skiphead.h>
diff --git a/src/tests/unit-tests/signal-processing-blocks/tracking/gps_l1_ca_dll_pll_tracking_test_fpga.cc b/src/tests/unit-tests/signal-processing-blocks/tracking/gps_l1_ca_dll_pll_tracking_test_fpga.cc
index d62956e30..977f87f7a 100644
--- a/src/tests/unit-tests/signal-processing-blocks/tracking/gps_l1_ca_dll_pll_tracking_test_fpga.cc
+++ b/src/tests/unit-tests/signal-processing-blocks/tracking/gps_l1_ca_dll_pll_tracking_test_fpga.cc
@@ -41,7 +41,11 @@
 #include <gnuradio/top_block.h>
 #include <gnuradio/blocks/file_source.h>
 #include <gnuradio/analog/sig_source_waveform.h>
+#ifdef GR_GREATER_38
+#include <gnuradio/analog/sig_source.h>
+#else
 #include <gnuradio/analog/sig_source_c.h>
+#endif
 #include <gnuradio/blocks/interleaved_char_to_complex.h>
 #include <gnuradio/blocks/null_sink.h>
 #include <gnuradio/blocks/skiphead.h>
diff --git a/src/tests/unit-tests/signal-processing-blocks/tracking/gps_l1_ca_kf_tracking_test.cc b/src/tests/unit-tests/signal-processing-blocks/tracking/gps_l1_ca_kf_tracking_test.cc
index 65e820921..599e408c6 100644
--- a/src/tests/unit-tests/signal-processing-blocks/tracking/gps_l1_ca_kf_tracking_test.cc
+++ b/src/tests/unit-tests/signal-processing-blocks/tracking/gps_l1_ca_kf_tracking_test.cc
@@ -38,7 +38,11 @@
 #include <gnuradio/top_block.h>
 #include <gnuradio/blocks/file_source.h>
 #include <gnuradio/analog/sig_source_waveform.h>
+#ifdef GR_GREATER_38
+#include <gnuradio/analog/sig_source.h>
+#else
 #include <gnuradio/analog/sig_source_c.h>
+#endif
 #include <gnuradio/blocks/interleaved_char_to_complex.h>
 #include <gnuradio/blocks/null_sink.h>
 #include <gnuradio/blocks/skiphead.h>
diff --git a/src/tests/unit-tests/signal-processing-blocks/tracking/gps_l2_m_dll_pll_tracking_test.cc b/src/tests/unit-tests/signal-processing-blocks/tracking/gps_l2_m_dll_pll_tracking_test.cc
index 5c9c035f9..3c40eb54c 100644
--- a/src/tests/unit-tests/signal-processing-blocks/tracking/gps_l2_m_dll_pll_tracking_test.cc
+++ b/src/tests/unit-tests/signal-processing-blocks/tracking/gps_l2_m_dll_pll_tracking_test.cc
@@ -35,7 +35,11 @@
 #include <gnuradio/top_block.h>
 #include <gnuradio/blocks/file_source.h>
 #include <gnuradio/analog/sig_source_waveform.h>
+#ifdef GR_GREATER_38
+#include <gnuradio/analog/sig_source.h>
+#else
 #include <gnuradio/analog/sig_source_c.h>
+#endif
 #include <gnuradio/msg_queue.h>
 #include <gnuradio/blocks/null_sink.h>
 #include <gnuradio/blocks/skiphead.h>