diff --git a/src/allmydata/web/storage.py b/src/allmydata/web/storage.py
index 8f36cf44d..a912d79f6 100644
--- a/src/allmydata/web/storage.py
+++ b/src/allmydata/web/storage.py
@@ -2,7 +2,7 @@
 import time, json
 from twisted.python.filepath import FilePath
 from twisted.web.template import tags as T, \
-    renderer, Element, renderElement, XMLFile
+    renderer, Element, renderElement, XMLFile, flattenString
 from allmydata.web.common import (
     abbreviate_time,
     MultiFormatResource