diff --git a/src/tests/unit-tests/signal-processing-blocks/pvt/nmea_printer_test.cc b/src/tests/unit-tests/signal-processing-blocks/pvt/nmea_printer_test.cc
index 1d7580b96..771c0a8ea 100644
--- a/src/tests/unit-tests/signal-processing-blocks/pvt/nmea_printer_test.cc
+++ b/src/tests/unit-tests/signal-processing-blocks/pvt/nmea_printer_test.cc
@@ -31,6 +31,7 @@
 
 #include "nmea_printer.h"
 #include "rtklib_rtkpos.h"
+#include "rtklib_solver.h"
 #include <cstdio>
 #include <fstream>
 #include <string>