--- old/make/lib/Lib-jdk.management.gmk	2017-10-05 11:56:16.960512978 +0200
+++ new/make/lib/Lib-jdk.management.gmk	2017-10-05 11:56:16.692517209 +0200
@@ -26,7 +26,7 @@
 include LibCommon.gmk
 
 # Hook to include the corresponding custom file, if present.
-$(eval $(call IncludeCustomExtension, , lib/Lib-jdk.management.gmk))
+$(eval $(call IncludeCustomExtension, lib/Lib-jdk.management.gmk))
 
 ################################################################################