diff --git a/attic/repository.py b/attic/repository.py
index 4338df082..9689c237f 100644
--- a/attic/repository.py
+++ b/attic/repository.py
@@ -3,6 +3,7 @@
 from itertools import islice
 import errno
 import os
+import shutil
 import struct
 import sys
 from zlib import crc32