diff --git a/pylons_app/model/db.py b/pylons_app/model/db.py
--- a/pylons_app/model/db.py
+++ b/pylons_app/model/db.py
@@ -56,7 +56,7 @@ class User(Base):
             self.last_login = datetime.datetime.now()
             session.add(self)
             session.commit()
-            log.debug('updated user %s lastlogin',self)
+            log.debug('updated user %s lastlogin',self.username)
         except Exception:
             session.rollback()