diff --git a/app/Auth/Access/LdapService.php b/app/Auth/Access/LdapService.php
index 47dc24532..a7ee3b374 100644
--- a/app/Auth/Access/LdapService.php
+++ b/app/Auth/Access/LdapService.php
@@ -76,6 +76,7 @@ class LdapService extends ExternalAuthService
         $idAttr = $this->config['id_attribute'];
         $emailAttr = $this->config['email_attribute'];
         $displayNameAttr = $this->config['display_name_attribute'];
+        $thumbnailAttr = $this->config['thumbnail_attribute'];
 
         $user = $this->getUserWithAttributes($userName, ['cn', 'dn', $idAttr, $emailAttr, $displayNameAttr]);