diff --git a/api/src/main/javascript/META-INF/resources/myfaces/_impl/quirks/_AjaxResponseQuirks.js b/api/src/main/javascript/META-INF/resources/myfaces/_impl/quirks/_AjaxResponseQuirks.js
index 66dd3cf79..4bc4a07d6 100644
--- a/api/src/main/javascript/META-INF/resources/myfaces/_impl/quirks/_AjaxResponseQuirks.js
+++ b/api/src/main/javascript/META-INF/resources/myfaces/_impl/quirks/_AjaxResponseQuirks.js
@@ -124,7 +124,7 @@ _MF_SINGLTN(_PFX_XHR + "_AjaxResponseQuirks", myfaces._impl.xhrCore._AjaxRespons
         //we have to work around an xml parsing bug in Webkit
         //see https://issues.apache.org/jira/browse/MYFACES-3061
         if (!isWebkit) {
-            doc = (arguments.length > 3) ? arguments[3] : _Lang.parseXML(newData);
+            doc =  _Lang.parseXML(newData);
         }
 
         if (!isWebkit && _Lang.isXMLParseError(doc)) {