diff --git a/ArduCopter/motors.pde b/ArduCopter/motors.pde
index 1da877b9dd..57e48ba29c 100644
--- a/ArduCopter/motors.pde
+++ b/ArduCopter/motors.pde
@@ -81,6 +81,8 @@ static void init_arm_motors()
 	// --------------------
 	init_simple_bearing();
 
+	init_z_damper();
+
 	// Reset home position
 	// -------------------
 	if(home_is_set)