diff --git a/doc/todo/comment_by_mail.mdwn b/doc/todo/comment_by_mail.mdwn
index 0f7534c35..a79a06078 100644
--- a/doc/todo/comment_by_mail.mdwn
+++ b/doc/todo/comment_by_mail.mdwn
@@ -6,7 +6,7 @@ I have in mind something like
   * add a mailto: url to each page matching some pagespec
     (currently every page gets a comment footer)
   * this mailto url goes to an address identifying the page  (something like
-    user-iki-blog~I_hate_markdown@host.fqdn.tld).  (DONE) 
+    user-iki-blog~I\_hate\_markdown@host.fqdn.tld).  (DONE) 
     [more details](http://www.cs.unb.ca/~bremner/blog/posts/encoding)         
    
   * on the mail receiving end, these messages are either deleted, or ran through