diff --git a/src/pas/plugins/sqlalchemy/plugin.py b/src/pas/plugins/sqlalchemy/plugin.py
index 2268ffe..aeaa639 100644
--- a/src/pas/plugins/sqlalchemy/plugin.py
+++ b/src/pas/plugins/sqlalchemy/plugin.py
@@ -234,6 +234,17 @@ def group_class(self):
     # IUserManagement implementation
     #
 
+    security.declarePrivate('updateUser')
+    @graceful_recovery()
+    def updateUser(self, user_id, login_name):
+        session = Session()
+        principal = self._get_principal_by_id(user_id)
+        principal.zope_id = login_name
+        userquery = session.query(self.user_class).filter_by(zope_id=user_id)
+        userquery = userquery.first()
+        userquery.login = login_name
+
+
     security.declarePrivate('doChangeUser')
     @graceful_recovery()
     def doChangeUser(self, principal_id, password, **kw):