diff --git a/libraries/AP_Vehicle/AP_Vehicle.h b/libraries/AP_Vehicle/AP_Vehicle.h
index 47bbf73d9f..a93746e232 100644
--- a/libraries/AP_Vehicle/AP_Vehicle.h
+++ b/libraries/AP_Vehicle/AP_Vehicle.h
@@ -203,7 +203,7 @@ public:
 
     // command throttle percentage and roll, pitch, yaw target
     // rates. For use with scripting controllers
-    virtual bool set_target_throttle_rate_rpy(float throttle_pct, float roll_rate_dps, float pitch_rate_dps, float yaw_rate_dps) { return false; }
+    virtual void set_target_throttle_rate_rpy(float throttle_pct, float roll_rate_dps, float pitch_rate_dps, float yaw_rate_dps) {}
     virtual bool nav_scripting_enable(uint8_t mode) {return false;}
 
     // get target location (for use by scripting)