diff -r bd4ce7f9ea2c -r 06bc4bd64599 src/jdk.jpackage/share/classes/jdk/jpackage/internal/resources/HelpResources.properties
--- a/src/jdk.jpackage/share/classes/jdk/jpackage/internal/resources/HelpResources.properties	Tue Dec 18 19:31:20 2018 -0500
+++ b/src/jdk.jpackage/share/classes/jdk/jpackage/internal/resources/HelpResources.properties	Fri Dec 21 07:40:47 2018 -0500
@@ -150,6 +150,11 @@
 \          Vendor of the application\n\
 \  --force Allow the deletion of any existing output root directory\n\
 \          when creating an Application image\n\
+\  --resource-dir <path>\n\
+\          Path to override jpackage resources\n\
+\          Icons, template files, and other resources of jpackage can be\n\
+\          over-ridden by adding replacement resources to this directory.\n\
+\          (absolute path or relative to the current directory)\n\
 \n\
 Modular options:\n\
 \  --module -m <module name>\n\