diff --git a/doc/plugins/comments/discussion.mdwn b/doc/plugins/comments/discussion.mdwn
index ceb02406d..2b8add938 100644
--- a/doc/plugins/comments/discussion.mdwn
+++ b/doc/plugins/comments/discussion.mdwn
@@ -227,3 +227,6 @@ use those formats because it would be a security problem.
 Any suggestions or hints how to implement this?
 
 -- [[wentasah]]
+
+> I've implemented this. See [[todo/Restrict_formats_allowed_for_comments]].
+> --[[wentasah]]