diff --git a/ui/jquery.ui.mouse.js b/ui/jquery.ui.mouse.js
index 0bd38db8530..2fb1389f2b8 100644
--- a/ui/jquery.ui.mouse.js
+++ b/ui/jquery.ui.mouse.js
@@ -58,7 +58,7 @@ $.widget("ui.mouse", {
 
 		var self = this,
 			btnIsLeft = (event.which == 1),
-			elIsCancel = (typeof this.options.cancel == "string" ? $(event.target).parents().add(event.target).filter(this.options.cancel).length : false);
+			elIsCancel = (typeof this.options.cancel == "string" ? $(event.target).closest(this.options.cancel).length : false);
 		if (!btnIsLeft || elIsCancel || !this._mouseCapture(event)) {
 			return true;
 		}