diff --git a/dev_server/sae/ext/shell.py b/dev_server/sae/ext/shell.py
index eed19ac..f881862 100644
--- a/dev_server/sae/ext/shell.py
+++ b/dev_server/sae/ext/shell.py
@@ -1,4 +1,4 @@
 
 # Copyright (C) 2012-2013 SINA, All rights reserved.
 
-ShellMiddleware = lambda x: x
+ShellMiddleware = lambda x, password=None: x