diff --git a/app/assets/javascripts/app/lib/core/jquery-ui-1.11.4.js b/app/assets/javascripts/app/lib/core/jquery-ui-1.11.4.js
index e82ee8f71..6002dc51f 100644
--- a/app/assets/javascripts/app/lib/core/jquery-ui-1.11.4.js
+++ b/app/assets/javascripts/app/lib/core/jquery-ui-1.11.4.js
@@ -1154,12 +1154,13 @@ $.position = {
 	getWithinInfo: function( element ) {
 		var withinElement = $( element || window ),
 			isWindow = $.isWindow( withinElement[0] ),
-			isDocument = !!withinElement[ 0 ] && withinElement[ 0 ].nodeType === 9;
+			isDocument = !!withinElement[ 0 ] && withinElement[ 0 ].nodeType === 9,
+			hasOffset = !isWindow && !isDocument;
 		return {
 			element: withinElement,
 			isWindow: isWindow,
 			isDocument: isDocument,
-			offset: withinElement.offset() || { left: 0, top: 0 },
+			offset: hasOffset ? $( element ).offset() : { left: 0, top: 0 },
 			scrollLeft: withinElement.scrollLeft(),
 			scrollTop: withinElement.scrollTop(),