diff --git a/libraries/AP_Vehicle/AP_FixedWing.h b/libraries/AP_Vehicle/AP_FixedWing.h
index 722c53dcaf..8135a7d160 100644
--- a/libraries/AP_Vehicle/AP_FixedWing.h
+++ b/libraries/AP_Vehicle/AP_FixedWing.h
@@ -12,6 +12,7 @@ struct AP_FixedWing {
     AP_Int8 throttle_cruise;
     AP_Int8 takeoff_throttle_max;
     AP_Int8 takeoff_throttle_min;
+    AP_Int8 takeoff_throttle_idle;
     AP_Int32 takeoff_options;
     AP_Int16 airspeed_min;
     AP_Int16 airspeed_max;