diff --git a/libraries/AP_GPS/AP_GPS.h b/libraries/AP_GPS/AP_GPS.h
index 59842279dd..c7f8c574d7 100644
--- a/libraries/AP_GPS/AP_GPS.h
+++ b/libraries/AP_GPS/AP_GPS.h
@@ -322,9 +322,6 @@ public:
     const Vector3f &get_antenna_offset(uint8_t instance) const {
         return _antenna_offset[instance];
     }
-    const Vector3f &get_antenna_offset(void) const {
-        return _antenna_offset[primary_instance];
-    }
 
     // set position for HIL
     void setHIL(uint8_t instance, GPS_Status status, uint64_t time_epoch_ms,