diff --git a/libraries/AP_GPS/GPS.h b/libraries/AP_GPS/GPS.h
index 0b66a63a0f..078fb43c3b 100644
--- a/libraries/AP_GPS/GPS.h
+++ b/libraries/AP_GPS/GPS.h
@@ -67,7 +67,7 @@ public:
     ///
     /// @returns			Current GPS status
     ///
-    GPS_Status          status(void) {
+    GPS_Status          status(void) const {
         return _status;
     }