diff --git a/gluon/contrib/redis_session.py b/gluon/contrib/redis_session.py
index 6e15b0ba..8322331c 100644
--- a/gluon/contrib/redis_session.py
+++ b/gluon/contrib/redis_session.py
@@ -189,7 +189,7 @@ class MockQuery(object):
             key = "%s:%s" % (self.keyprefix, self.value)
             rtn = self.db.hmset(key, kwargs)
             if self.session_expiry:
-                self.db.expire(key, self.session.expiry)
+                self.db.expire(key, self.session_expiry)
             return rtn