--- old/jdk/make/gensrc/Gensrc-java.management.gmk	2015-02-27 10:45:57.000000000 -0800
+++ new/jdk/make/gensrc/Gensrc-java.management.gmk	2015-02-27 10:45:56.000000000 -0800
@@ -25,6 +25,9 @@
 
 include GensrcCommon.gmk
 
+# Hook to include the corresponding custom file, if present.
+$(eval $(call IncludeCustomExtension, jdk, gensrc/Gensrc-java.management.gmk))
+
 ################################################################################
 
 include GensrcProperties.gmk