diff --git a/ArduCopter/config.h b/ArduCopter/config.h
index bf54d1351c..52ed4f1332 100644
--- a/ArduCopter/config.h
+++ b/ArduCopter/config.h
@@ -588,5 +588,5 @@
 #endif
 
 #ifndef CH_MODE_DEFAULT
-#define CH_MODE_DEFAULT CH_5
+ # define CH_MODE_DEFAULT   5
 #endif