diff --git a/ui/jquery.ui.core.js b/ui/jquery.ui.core.js
index bd3e30758..4ad4f8a09 100644
--- a/ui/jquery.ui.core.js
+++ b/ui/jquery.ui.core.js
@@ -180,9 +180,6 @@ $.extend( $.expr[ ":" ], {
 	}
 });
 
-// support
-$.support.selectstart = "onselectstart" in document.createElement( "div" );
-
 // support: jQuery <1.8
 if ( !$( "<a>" ).outerWidth( 1 ).jquery ) {
 	$.each( [ "Width", "Height" ], function( i, name ) {
@@ -250,6 +247,7 @@ if ( $( "<a>" ).data( "a-b", "a" ).removeData( "a-b" ).data( "a-b" ) ) {
 // deprecated
 $.ui.ie = !!/msie [\w.]+/.exec( navigator.userAgent.toLowerCase() );
 
+$.support.selectstart = "onselectstart" in document.createElement( "div" );
 $.fn.extend({
 	disableSelection: function() {
 		return this.bind( ( $.support.selectstart ? "selectstart" : "mousedown" ) +