diff --git a/ArduCopter/ArduCopter.pde b/ArduCopter/ArduCopter.pde
index 9368f051ae..6f57c8e75e 100644
--- a/ArduCopter/ArduCopter.pde
+++ b/ArduCopter/ArduCopter.pde
@@ -80,6 +80,7 @@ http://code.google.com/p/ardupilot-mega/downloads/list
 // Configuration
 #include "defines.h"
 #include "config.h"
+#include "config_motors.h"
 
 // Local modules
 #include "Parameters.h"