diff --git a/src/algorithms/PVT/gnuradio_blocks/rtklib_pvt_gs.cc b/src/algorithms/PVT/gnuradio_blocks/rtklib_pvt_gs.cc
index 7c14b6350..1795671a6 100644
--- a/src/algorithms/PVT/gnuradio_blocks/rtklib_pvt_gs.cc
+++ b/src/algorithms/PVT/gnuradio_blocks/rtklib_pvt_gs.cc
@@ -498,7 +498,7 @@ rtklib_pvt_gs::rtklib_pvt_gs(uint32_t nchannels,
     std::ostringstream os;
 #ifdef HAS_PUT_TIME
     time_t when = std::time(nullptr);
-    auto const tm = *std::localtime(&when);
+    const auto& tm = *std::localtime(&when);
     os << std::put_time(&tm, "%z");
 #endif
     std::string utc_diff_str = os.str();  // in ISO 8601 format: "+HHMM" or "-HHMM"