diff --git a/gallery_dl/util.py b/gallery_dl/util.py
index 751c3986b9..de4d37f931 100644
--- a/gallery_dl/util.py
+++ b/gallery_dl/util.py
@@ -576,6 +576,7 @@ def __str__():
     "hash_sha1": sha1,
     "hash_md5" : md5,
     "re"       : re,
+    "functools": functools,
 }