diff --git a/dak/control_suite.py b/dak/control_suite.py
index c1c29dc29e096663148aa6819c52ac7b1e6a5695..ee55fcc59e5f8dbf16daf51917306161138ef0bf 100755
--- a/dak/control_suite.py
+++ b/dak/control_suite.py
@@ -43,6 +43,7 @@
 
 import sys
 import apt_pkg
+import os
 
 from daklib.config import Config
 from daklib.dbconn import *