1 files changed, 5 insertions, 2 deletions
diff --git a/ui/unique-id.js b/ui/unique-id.js
index a8db136e3..518ba7a0c 100644
--- a/ui/unique-id.js
+++ b/ui/unique-id.js
@@ -13,6 +13,8 @@
 //>>docs: http://api.jqueryui.com/uniqueId/
 
 ( function( factory ) {
+	"use strict";
+
 	if ( typeof define === "function" && define.amd ) {
 
 		// AMD. Register as an anonymous module.
@@ -22,7 +24,8 @@
 		// Browser globals
 		factory( jQuery );
 	}
-} ( function( $ ) {
+} )( function( $ ) {
+"use strict";
 
 return $.fn.extend( {
 	uniqueId: ( function() {
@@ -46,4 +49,4 @@ return $.fn.extend( {
 	}
 } );
 
-} ) );
+} );