diff --git a/authentication.php b/authentication.php
index 82d2be9..0183d0d 100644
--- a/authentication.php
+++ b/authentication.php
@@ -187,7 +187,8 @@ class authentication
                       LOG_WARNING,
                       "Logging error for '$authparams->email' (REST) : $res");
       // Authentication error
-      throw new \Exception (_("Authentication error"), 403);
+      throw new \Exception (dgettext ("domframework",
+                                      "Authentication error"), 403);
     }
     return $res;
   }