diff --git a/libraries/AP_Notify/AP_Notify.h b/libraries/AP_Notify/AP_Notify.h
index effa9f0c346987..ca4c4a66c44266 100644
--- a/libraries/AP_Notify/AP_Notify.h
+++ b/libraries/AP_Notify/AP_Notify.h
@@ -63,6 +63,7 @@ class AP_Notify
         uint32_t external_leds      : 1;    // 1 if external LEDs are enabled (normally only used for copter)
         uint32_t vehicle_lost       : 1;    // 1 when lost copter tone is requested (normally only used for copter)
         uint32_t waiting_for_throw  : 1;    // 1 when copter is in THROW mode and waiting to detect the user hand launch
+        uint32_t powering_off       : 1;    // 1 when the vehicle is powering off
     };
 
     /// notify_events_type - bitmask of active events.