diff --git a/core/misc/drupal.js b/core/misc/drupal.js
index a7d3d0d..0e3eb11 100644
--- a/core/misc/drupal.js
+++ b/core/misc/drupal.js
@@ -429,10 +429,8 @@ Drupal.AjaxError = function(xmlhttp, uri) {
   // We don't need readyState except for status == 0.
   readyStateText = xmlhttp.status === 0 ? ("\n" + Drupal.t("ReadyState: !readyState", {'!readyState': xmlhttp.readyState})) : "";
 
-  message = statusCode + pathText + statusText + responseText + readyStateText;
-
-  this.name = message;
-  Error.call(this, message);
+  this.message = statusCode + pathText + statusText + responseText + readyStateText;
+  this.name = 'AjaxError';
 };
 
 Drupal.AjaxError.prototype = new Error();