diff --git a/libraries/AP_NavEKF3/AP_NavEKF3.cpp b/libraries/AP_NavEKF3/AP_NavEKF3.cpp
index 725f1d36b2..69af0a4b91 100644
--- a/libraries/AP_NavEKF3/AP_NavEKF3.cpp
+++ b/libraries/AP_NavEKF3/AP_NavEKF3.cpp
@@ -583,7 +583,7 @@ void NavEKF3::check_log_write(void)
         logging.log_compass = false;
     }
     if (logging.log_gps) {
-        DataFlash_Class::instance()->Log_Write_GPS(_ahrs->get_gps(), 0, imuSampleTime_us);
+        DataFlash_Class::instance()->Log_Write_GPS(_ahrs->get_gps(), _ahrs->get_gps().primary_sensor(), imuSampleTime_us);
         logging.log_gps = false;
     }
     if (logging.log_baro) {