diff --git a/ArduCopter/control_auto.pde b/ArduCopter/control_auto.pde
index 5db8cbfa82..99751ac323 100644
--- a/ArduCopter/control_auto.pde
+++ b/ArduCopter/control_auto.pde
@@ -537,7 +537,7 @@ void set_auto_yaw_mode(uint8_t yaw_mode)
     }
 }
 
-// set_auto_yaw_look_at_heading - sets the yaw look at heading for auto mode 
+// set_auto_yaw_look_at_heading - sets the yaw look at heading for auto mode
 static void set_auto_yaw_look_at_heading(float angle_deg, float turn_rate_dps, int8_t direction, uint8_t relative_angle)
 {
     // get current yaw target