diff --git a/core/model/modx/moduser.class.php b/core/model/modx/moduser.class.php
index 89e6c7a0281..3fed9b01479 100644
--- a/core/model/modx/moduser.class.php
+++ b/core/model/modx/moduser.class.php
@@ -918,7 +918,7 @@ public function getProfilePhoto($width = 128, $height = 128) {
      *
      * @return string The Gravatar photo URL
      */
-    public function getGravatar($size = 128, $default = 'mm') {
+    public function getGravatar($size = 128, $default = 'retro') {
         $gravemail = md5(
             strtolower(
                 trim($this->Profile->email)