diff --git a/britney.py b/britney.py
index 1c5dc26..4ebe704 100755
--- a/britney.py
+++ b/britney.py
@@ -194,6 +194,7 @@ from excuse import Excuse
 from migrationitem import MigrationItem, HintItem
 from hints import HintCollection
 from britney import buildSystem
+from functools import reduce
 
 __author__ = 'Fabio Tranchitella and the Debian Release Team'
 __version__ = '2.0'