diff --git a/bitbake/lib/bb/siggen.py b/bitbake/lib/bb/siggen.py
index e804d611b9..494282b247 100644
--- a/bitbake/lib/bb/siggen.py
+++ b/bitbake/lib/bb/siggen.py
@@ -1,5 +1,6 @@
 import hashlib
 import logging
+import os
 import re
 import bb.data