diff --git a/larpe/trunk/larpe/saml2.ptl b/larpe/trunk/larpe/saml2.ptl
index 758ba78..7f1e617 100644
--- a/larpe/trunk/larpe/saml2.ptl
+++ b/larpe/trunk/larpe/saml2.ptl
@@ -191,7 +191,7 @@ class Saml2(Saml2Directory):
             return 'Your browser should redirect you'
 
     def lookup_user(self, session, login):
-        found_users = list(User.select(lambda x: login.nameIdentifier.content in x.name_identifiers))
+        found_users = list(User.select(lambda x: login.nameIdentifier.content in x.name_identifiers), ignore_errors = True)
         if found_users:
             return found_users[0]
         return None