diff --git a/doc/todo/MD5E_keys_without_file_size.mdwn b/doc/todo/MD5E_keys_without_file_size.mdwn
index a0ec56f1a1..0a9c1c0cf7 100644
--- a/doc/todo/MD5E_keys_without_file_size.mdwn
+++ b/doc/todo/MD5E_keys_without_file_size.mdwn
@@ -5,4 +5,5 @@ Another (and more generally useful) solution would be [[todo/alternate_keys_for_
 > Closing, because [[external_backends]] is implemented, so you should be
 > able to roll your own backend for your use case here. Assuming you can't
 > just use regular MD5E and omit the file size field, which will work too.
+> [[done]]
 > --[[Joey]]