diff --git a/ArduCopterMega/ArduCopterMega.pde b/ArduCopterMega/ArduCopterMega.pde
index 241ee8e0d1..b684771aad 100644
--- a/ArduCopterMega/ArduCopterMega.pde
+++ b/ArduCopterMega/ArduCopterMega.pde
@@ -230,6 +230,7 @@ boolean		motor_auto_safe;
 int 	max_stabilize_dampener;				//
 int 	max_yaw_dampener;					//
 boolean rate_yaw_flag;						// used to transition yaw control from Rate control to Yaw hold
+byte 	yaw_debug;
 
 // LED output
 // ----------
@@ -1169,4 +1170,5 @@ adjust_altitude()
 			}
 		}
 	}
-}
+}
+