diff --git a/gluon/contrib/login_methods/ldap_auth.py b/gluon/contrib/login_methods/ldap_auth.py
index a5b16b93..a4659618 100644
--- a/gluon/contrib/login_methods/ldap_auth.py
+++ b/gluon/contrib/login_methods/ldap_auth.py
@@ -432,7 +432,8 @@ def ldap_auth(server='ldap',
                     # #############
                     fields = ['first_name', 'last_name']
                     user_in_db = db(db.auth_user.email == username)
-                update_or_insert_values = {f: update_or_insert_values[f] for f in fields}
+                    update_or_insert_values = dict(((f, update_or_insert_values[f]) for f in fields))
+
                 if user_in_db.count() > 0:
                     actual_values = user_in_db.select(*[db.auth_user[f] for f in fields]).first().as_dict()
                     if update_or_insert_values != actual_values:  # We don't update record if values are the same