diff --git a/src/algorithms/PVT/libs/rtklib_solver.cc b/src/algorithms/PVT/libs/rtklib_solver.cc
index f546ce63e..45de55b96 100644
--- a/src/algorithms/PVT/libs/rtklib_solver.cc
+++ b/src/algorithms/PVT/libs/rtklib_solver.cc
@@ -94,6 +94,7 @@ Rtklib_Solver::Rtklib_Solver(int nchannels, std::string dump_filename, bool flag
     d_dump_filename = std::move(dump_filename);
     d_flag_dump_enabled = flag_dump_to_file;
     d_flag_dump_mat_enabled = flag_dump_to_mat;
+    count_valid_position = 0;
     this->set_averaging_flag(false);
     rtk_ = rtk;
 
diff --git a/src/algorithms/PVT/libs/rtklib_solver.h b/src/algorithms/PVT/libs/rtklib_solver.h
index a393c1f63..1fa4ba8dd 100644
--- a/src/algorithms/PVT/libs/rtklib_solver.h
+++ b/src/algorithms/PVT/libs/rtklib_solver.h
@@ -126,6 +126,8 @@ public:
     Beidou_Dnav_Iono beidou_dnav_iono;
     std::map<int, Beidou_Dnav_Almanac> beidou_dnav_almanac_map;
 
+    int count_valid_position;
+
 private:
     rtk_t rtk_{};
     std::string d_dump_filename;