diff --git a/posts.py b/posts.py
index 85a691b91..9aa75350c 100644
--- a/posts.py
+++ b/posts.py
@@ -30,6 +30,7 @@ from session import postJsonString
 from session import postImage
 from webfinger import webfingerHandle
 from httpsig import createSignedHeader
+from utils import getCachedPostFilename
 from utils import getStatusNumber
 from utils import createPersonDir
 from utils import urlPermitted