--- a/jdk/make/Images.gmk	Wed Feb 12 10:51:50 2014 -0800
+++ b/jdk/make/Images.gmk	Thu Feb 13 00:01:07 2014 +0100
@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2011, 2013, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2011, 2014, Oracle and/or its affiliates. All rights reserved.
 # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 #
 # This code is free software; you can redistribute it and/or modify it
@@ -783,4 +783,5 @@
 
 .PHONY: default images jre-image jdk-image
 
--include $(CUSTOM_MAKE_DIR)/Images.gmk
+# Hook to include the corresponding custom file, if present.
+$(eval $(call IncludeCustomExtension, jdk, Images.gmk))