diff --git a/glanceclient/v1/shell.py b/glanceclient/v1/shell.py
index 92bdd014..bc689da0 100644
--- a/glanceclient/v1/shell.py
+++ b/glanceclient/v1/shell.py
@@ -19,6 +19,7 @@ import copy
 import functools
 import os
 import six
+import sys
 
 from oslo_utils import encodeutils
 from oslo_utils import strutils