diff --git a/ui/ui.core.js b/ui/ui.core.js
index 413d5ee1b..2cf48d11f 100644
--- a/ui/ui.core.js
+++ b/ui/ui.core.js
@@ -238,6 +238,7 @@ $.widget.defaults = {
 /** jQuery UI core **/
 
 $.ui = {
+	// $.ui.plugin is deprecated.  Use the proxy pattern instead.
 	plugin: {
 		add: function(module, option, set) {
 			var proto = $.ui[module].prototype;