diff --git a/libraries/AP_Vehicle/ModeReason.h b/libraries/AP_Vehicle/ModeReason.h
index 2ef46b684a..d0a4f56001 100644
--- a/libraries/AP_Vehicle/ModeReason.h
+++ b/libraries/AP_Vehicle/ModeReason.h
@@ -51,4 +51,6 @@ enum class ModeReason : uint8_t {
   STARTUP,
   SCRIPTING,
   UNAVAILABLE,
+  AUTOROTATION_START,
+  AUTOROTATION_BAILOUT,
 };