diff --git a/ArduSub/Sub.h b/ArduSub/Sub.h
index 00000fbc69..1f096ede03 100644
--- a/ArduSub/Sub.h
+++ b/ArduSub/Sub.h
@@ -214,7 +214,6 @@ private:
     // This is the state of the flight control system
     // There are multiple states defined such as STABILIZE, ACRO,
     control_mode_t control_mode;
-    ModeReason control_mode_reason = ModeReason::UNKNOWN;
 
     control_mode_t prev_control_mode;
     ModeReason prev_control_mode_reason = ModeReason::UNKNOWN;