diff --git a/addons/auth_oauth/controllers/main.py b/addons/auth_oauth/controllers/main.py
index 0e4d5572c52..a4b474f1f09 100644
--- a/addons/auth_oauth/controllers/main.py
+++ b/addons/auth_oauth/controllers/main.py
@@ -83,10 +83,10 @@ class OAuthLogin(openerp.addons.web.controllers.main.Home):
                 error = _("You do not have access to this database or your invitation has expired. Please ask for an invitation and be sure to follow the link in your invitation email.")
             else:
                 error = None
-            response.params['values'].update(
-                providers=providers,
-                error=error,
-            )
+
+            response.params['values']['providers'] = providers
+            if error:
+                response.params['values']['error'] = error
 
         return response