diff --git a/bitbake/lib/hashserv/client.py b/bitbake/lib/hashserv/client.py
index 2559bbb3fb..f65956617b 100644
--- a/bitbake/lib/hashserv/client.py
+++ b/bitbake/lib/hashserv/client.py
@@ -7,6 +7,7 @@ from contextlib import closing
 import json
 import logging
 import socket
+import os
 
 
 logger = logging.getLogger('hashserv.client')