diff --git a/libraries/AP_Vehicle/AP_Vehicle.h b/libraries/AP_Vehicle/AP_Vehicle.h
index 9c607600ef..c50e2d7901 100644
--- a/libraries/AP_Vehicle/AP_Vehicle.h
+++ b/libraries/AP_Vehicle/AP_Vehicle.h
@@ -36,6 +36,7 @@ public:
         AP_Int16 airspeed_max;
         AP_Int16 pitch_limit_max_cd;
         AP_Int16 pitch_limit_min_cd;        
+        AP_Int8  autotune_level;
     };
 
     /*