--- old/make/gensrc/Gensrc-jdk.localedata.gmk	2017-10-05 11:56:06.156683532 +0200
+++ new/make/gensrc/Gensrc-jdk.localedata.gmk	2017-10-05 11:56:05.916687321 +0200
@@ -26,7 +26,7 @@
 include GensrcCommonJdk.gmk
 
 # Hook to include the corresponding custom file, if present.
-$(eval $(call IncludeCustomExtension, , gensrc/Gensrc-jdk.localedata.gmk))
+$(eval $(call IncludeCustomExtension, gensrc/Gensrc-jdk.localedata.gmk))
 
 include GensrcLocaleData.gmk
 include GensrcCLDR.gmk