diff --git a/ArduCopter/ArduCopter.pde b/ArduCopter/ArduCopter.pde
index 9071983d05..2b691d9039 100644
--- a/ArduCopter/ArduCopter.pde
+++ b/ArduCopter/ArduCopter.pde
@@ -2263,3 +2263,5 @@ static void tuning(){
     }
 }
 
+AP_HAL_MAIN();
+