diff --git a/larpe/trunk/larpe/saml2.ptl b/larpe/trunk/larpe/saml2.ptl
index 7e1fb87..758ba78 100644
--- a/larpe/trunk/larpe/saml2.ptl
+++ b/larpe/trunk/larpe/saml2.ptl
@@ -403,8 +403,10 @@ class Saml2(Saml2Directory):
                         and ( not session_index
                                 or session2.lasso_session_indexes.get(providerId) == session_index):
                     if session2.users.has_key(providerId):
-                        # try a local logout
-                        site_authentication.get_site_authentication(Host.get_host_from_url()).local_logout(user=session2.users[providerId], cookies=getattr(session2,'cookies'))
+                        # local logout
+                        site_auth = site_authentication.get_site_authentication(Host.get_host_from_url())
+                        site_auth.local_logout(user=session2.get_user(providerId),
+                                cookies=getattr(session2,'cookies', None))
                         del session2.users[providerId]
                     if session2.lasso_session_dumps.has_key(providerId):
                         del session2.lasso_session_dumps[providerId]