diff --git a/include/class.auth.php b/include/class.auth.php
index efab40230af3da62f98219a86c174f29435af4aa..74e7b9c787635fbf5cf3a30b6100164f794a8886 100644
--- a/include/class.auth.php
+++ b/include/class.auth.php
@@ -448,7 +448,7 @@ abstract class UserAuthenticationBackend  extends AuthenticationBackend {
     }
 
     function getAllowedBackends($userid) {
-        $backends = array('authtoken');
+        $backends = array();
         $sql = 'SELECT A1.backend FROM '.USER_ACCOUNT_TABLE
               .' A1 INNER JOIN '.USER_EMAIL_TABLE.' A2 ON (A2.user_id = A1.user_id)'
               .' WHERE backend IS NOT NULL '