diff --git a/src/algorithms/PVT/gnuradio_blocks/rtklib_pvt_gs.cc b/src/algorithms/PVT/gnuradio_blocks/rtklib_pvt_gs.cc
index 7f8998236..85a048f78 100644
--- a/src/algorithms/PVT/gnuradio_blocks/rtklib_pvt_gs.cc
+++ b/src/algorithms/PVT/gnuradio_blocks/rtklib_pvt_gs.cc
@@ -168,7 +168,8 @@ rtklib_pvt_gs::rtklib_pvt_gs(uint32_t nchannels,
       d_show_local_time_zone(conf_.show_local_time_zone),
       d_waiting_obs_block_rx_clock_offset_correction_msg(false),
       d_enable_rx_clock_correction(conf_.enable_rx_clock_correction),
-      d_an_printer_enabled(conf_.an_output_enabled)
+      d_an_printer_enabled(conf_.an_output_enabled),
+      d_log_timetag(conf_.log_source_timetag)
 {
     // Send feedback message to observables block with the receiver clock offset
     this->message_port_register_out(pmt::mp("pvt_to_observables"));
@@ -560,10 +561,9 @@ rtklib_pvt_gs::rtklib_pvt_gs(uint32_t nchannels,
     tracelevel(conf_.rtk_trace_level);
 
     // timetag
-    d_log_timetag = conf_.log_source_timetag;
     if (d_log_timetag)
         {
-            d_log_timetag_file = std::fstream(conf_.log_source_timetag_file, std::ios::out | std::ios::binary);
+            d_log_timetag_file.open(conf_.log_source_timetag_file, std::ios::out | std::ios::binary);
             std::cout << "Log PVT timetag metadata enabled, log file: " << conf_.log_source_timetag_file << "\n";
         }
     d_start = std::chrono::system_clock::now();
diff --git a/src/algorithms/PVT/gnuradio_blocks/rtklib_pvt_gs.h b/src/algorithms/PVT/gnuradio_blocks/rtklib_pvt_gs.h
index dcdbca307..bfd53db63 100644
--- a/src/algorithms/PVT/gnuradio_blocks/rtklib_pvt_gs.h
+++ b/src/algorithms/PVT/gnuradio_blocks/rtklib_pvt_gs.h
@@ -30,12 +30,13 @@
 #include <cstddef>                // for size_t
 #include <cstdint>                // for int32_t
 #include <ctime>                  // for time_t
+#include <fstream>                // for std::fstream
 #include <map>                    // for map
 #include <memory>                 // for shared_ptr, unique_ptr
-#include <queue>
-#include <string>       // for string
-#include <sys/types.h>  // for key_t
-#include <vector>       // for vector
+#include <queue>                  // for std::queue
+#include <string>                 // for string
+#include <sys/types.h>            // for key_t
+#include <vector>                 // for vector
 
 /** \addtogroup PVT
  * \{ */
@@ -167,7 +168,6 @@ private:
     bool save_gnss_synchro_map_xml(const std::string& file_name);  // debug helper function
     bool load_gnss_synchro_map_xml(const std::string& file_name);  // debug helper function
 
-    bool d_log_timetag;
     std::fstream d_log_timetag_file;
 
     std::shared_ptr<Rtklib_Solver> d_internal_pvt_solver;
@@ -286,6 +286,7 @@ private:
     bool d_enable_rx_clock_correction;
     bool d_enable_has_messages;
     bool d_an_printer_enabled;
+    bool d_log_timetag;
 };