diff --git a/core/misc/ajax.es6.js b/core/misc/ajax.es6.js
index 6c1ff29848d19ef97bba72ace457df70e58d82fa..a108a83b5e7a641672de0beeb384bb7b09c67bf4 100644
--- a/core/misc/ajax.es6.js
+++ b/core/misc/ajax.es6.js
@@ -1346,7 +1346,7 @@
      *   The XMLHttpRequest status.
      */
     alert(ajax, response, status) {
-      window.alert(response.text, response.title);
+      window.alert(response.text);
     },
 
     /**
diff --git a/core/misc/ajax.js b/core/misc/ajax.js
index 9135ae485c2ef7d2223087a4dcc37839a8fd0f45..c19b3f5f177f6248b1c4dcde03dfa989fb4db46a 100644
--- a/core/misc/ajax.js
+++ b/core/misc/ajax.js
@@ -586,7 +586,7 @@ function _arrayLikeToArray(arr, len) { if (len == null || len > arr.length) len
       }
     },
     alert: function alert(ajax, response, status) {
-      window.alert(response.text, response.title);
+      window.alert(response.text);
     },
     announce: function announce(ajax, response) {
       if (response.priority) {