diff --git a/includes/page.php b/includes/page.php
index e382c7a..546a69a 100644
--- a/includes/page.php
+++ b/includes/page.php
@@ -92,7 +92,7 @@ class Page {
      * @return string
      */
     function get_avatar($name, $uuid) {
-        if ($uuid[14] === '3') {
+        if (strlen($uuid) === 36 && $uuid[14] === '3') {
             // Avatars cannot be associated with offline mode UUIDs (version 3)
             $uuid = $name;
         }