diff --git a/app/notify_client/models.py b/app/notify_client/models.py
index 0ca6d8991..bedbbd051 100644
--- a/app/notify_client/models.py
+++ b/app/notify_client/models.py
@@ -141,7 +141,7 @@ class User(UserMixin):
 
 class InvitedUser(object):
 
-    def __init__(self, id, service, from_user, email_address, permissions, status, created_at):
+    def __init__(self, id, service, from_user, email_address, permissions, status, created_at, auth_type=None):
         self.id = id
         self.service = str(service)
         self.from_user = from_user