diff --git a/ArduSub/commands.cpp b/ArduSub/commands.cpp
index 3ad25be0d4..a6a3ce66d9 100644
--- a/ArduSub/commands.cpp
+++ b/ArduSub/commands.cpp
@@ -141,10 +141,9 @@ void Sub::set_system_time_from_GPS()
 
     // if we have a 3d lock and valid location
     if (gps.status() >= AP_GPS::GPS_OK_FIX_3D) {
-        // set system clock for log timestamps
-        hal.util->set_system_clock(gps.time_epoch_usec());
         uint64_t gps_timestamp = gps.time_epoch_usec();
 
+        // set system clock for log timestamps
         hal.util->set_system_clock(gps_timestamp);
 
         // update signing timestamp