diff --git a/ArduCopter/config.h b/ArduCopter/config.h
index 01043765d4..835098c8e4 100644
--- a/ArduCopter/config.h
+++ b/ArduCopter/config.h
@@ -731,10 +731,10 @@
 #endif
 
 //////////////////////////////////////////////////////////////////////////////
-// AP_Limits Defaults
+// Fence, Rally and Terrain defaults
 //
 
-// Enable/disable AP_Limits
+// Enable/disable Fence
 #ifndef AC_FENCE
  #define AC_FENCE ENABLED
 #endif