diff --git a/undelete.py b/undelete.py
index faafd5f12e1f2a3315a75bf53fa51239d9b1429a..908d4183013847a3e5c8f28c25b36813b3409a68 100644
--- a/undelete.py
+++ b/undelete.py
@@ -1,5 +1,6 @@
 import couchconnection
 import json
+import sys
 
 (db, conn) = couchconnection.arsnova_connection("/etc/arsnova/arsnova.properties")