diff --git a/ui/jquery.ui.core.js b/ui/jquery.ui.core.js
index 197a1aba917..c0eab46b4d4 100644
--- a/ui/jquery.ui.core.js
+++ b/ui/jquery.ui.core.js
@@ -118,15 +118,13 @@ $.fn.extend({
 	enableSelection: function() {
 		return this
 			.attr('unselectable', 'off')
-			.css('MozUserSelect', '')
-			.unbind('selectstart.ui');
+			.css('MozUserSelect', '');
 	},
 
 	disableSelection: function() {
 		return this
 			.attr('unselectable', 'on')
-			.css('MozUserSelect', 'none')
-			.bind('selectstart.ui', function() { return false; });
+			.css('MozUserSelect', 'none');
 	},
 
 	scrollParent: function() {