diff --git a/addons/auth_oauth/res_users.py b/addons/auth_oauth/res_users.py
index 762559d8b81..b1c7e214f12 100644
--- a/addons/auth_oauth/res_users.py
+++ b/addons/auth_oauth/res_users.py
@@ -51,6 +51,7 @@ class res_users(osv.Model):
             :param validation: result of validation of access token (dict)
             :param params: oauth parameters (dict)
             :return: user login (str)
+            :raise: openerp.exceptions.AccessDenied if signin failed
 
             This method can be overridden to add alternative signin methods.
         """