diff --git a/bitbake/doc/conf.py b/bitbake/doc/conf.py
index 354dff36f7..fc2ee08111 100644
--- a/bitbake/doc/conf.py
+++ b/bitbake/doc/conf.py
@@ -14,6 +14,7 @@
 # import sys
 # sys.path.insert(0, os.path.abspath('.'))
 
+import sys
 import datetime
 
 current_version = "dev"