diff --git a/gluon/tools.py b/gluon/tools.py
index e6cd7c16..6e5b2f4f 100644
--- a/gluon/tools.py
+++ b/gluon/tools.py
@@ -2559,8 +2559,8 @@ class Auth(object):
             if not 'first_name' in keys and 'first_name' in table_user.fields:
                 guess = keys.get('email', 'anonymous').split('@')[0]
                 keys['first_name'] = keys.get('username', guess)
-            form = table_user._filter_fields(keys)
-            user_id = table_user.insert(**form)
+            vars = table_user._filter_fields(keys)
+            user_id = table_user.insert(**vars)
             user = table_user[user_id]
             if self.settings.create_user_groups:
                 group_id = self.add_group(
@@ -2571,7 +2571,7 @@ class Auth(object):
             if login:
                 self.user = user
             if self.settings.register_onaccept:
-                callback(self.settings.register_onaccept, user)
+                callback(self.settings.register_onaccept, Storage(vars=user))
         return user
 
     def basic(self, basic_auth_realm=False):