--- old/make/launcher/Launcher-java.desktop.gmk	2017-10-05 11:56:13.180572649 +0200
+++ new/make/launcher/Launcher-java.desktop.gmk	2017-10-05 11:56:12.932576564 +0200
@@ -26,7 +26,7 @@
 include LauncherCommon.gmk
 
 # Hook to include the corresponding custom file, if present.
-$(eval $(call IncludeCustomExtension, , launcher/Launcher-java.desktop.gmk))
+$(eval $(call IncludeCustomExtension, launcher/Launcher-java.desktop.gmk))
 
 ifeq ($(ENABLE_HEADLESS_ONLY), false)
   $(eval $(call SetupBuildLauncher, appletviewer, \