diff --git a/ArduCopter/system.pde b/ArduCopter/system.pde
index 2ace5945fb..209cf478aa 100644
--- a/ArduCopter/system.pde
+++ b/ArduCopter/system.pde
@@ -389,7 +389,6 @@ static void set_mode(byte mode)
 			mode = STABILIZE;
 	}
 
-	old_control_mode 	= control_mode;
 	control_mode 		= mode;
 	control_mode 		= constrain(control_mode, 0, NUM_MODES - 1);