diff --git a/ui/jquery.ui.mouse.js b/ui/jquery.ui.mouse.js
index 2fb1389f2b8..7e38c69c444 100644
--- a/ui/jquery.ui.mouse.js
+++ b/ui/jquery.ui.mouse.js
@@ -12,11 +12,6 @@
  */
 (function( $, undefined ) {
 
-var mouseHandled = false;
-$(document).mousedown(function(e) {
-	mouseHandled = false;
-});
-
 $.widget("ui.mouse", {
 	options: {
 		cancel: ':input,option',
@@ -49,7 +44,9 @@ $.widget("ui.mouse", {
 
 	_mouseDown: function(event) {
 		// don't let more than one widget handle mouseStart
-		if(mouseHandled) {return};
+		// TODO: figure out why we have to use originalEvent
+		event.originalEvent = event.originalEvent || {};
+		if (event.originalEvent.mouseHandled) { return; }
 
 		// we may have missed mouseup (out of window)
 		(this._mouseStarted && this._mouseUp(event));
@@ -95,8 +92,7 @@ $.widget("ui.mouse", {
 			.bind('mouseup.'+this.widgetName, this._mouseUpDelegate);
 
 		event.preventDefault();
-		
-		mouseHandled = true;
+		event.originalEvent.mouseHandled = true;
 		return true;
 	},