--- old/make/gensrc/Gensrc-jdk.internal.vm.compiler.gmk	2017-10-05 11:56:05.532693383 +0200
+++ new/make/gensrc/Gensrc-jdk.internal.vm.compiler.gmk	2017-10-05 11:56:05.280697361 +0200
@@ -28,7 +28,7 @@
 include $(SPEC)
 include MakeBase.gmk
 
-$(eval $(call IncludeCustomExtension, , gensrc/Gensrc-jdk.internal.vm.compiler.gmk))
+$(eval $(call IncludeCustomExtension, gensrc/Gensrc-jdk.internal.vm.compiler.gmk))
 
 GENSRC_DIR := $(SUPPORT_OUTPUTDIR)/gensrc/$(MODULE)
 SRC_DIR := $(TOPDIR)/src/$(MODULE)/share/classes