diff --git a/doc/config.html b/doc/config.html
index b4352e91..9a39caf6 100755
--- a/doc/config.html
+++ b/doc/config.html
@@ -1427,7 +1427,7 @@ Subst on edit author = $full_name
       </li>
       <li>
         <code><b>Type &lt;attribute&gt; = date | datetime | numeric |
-        userlist | useremail | muserlist</b></code><br>
+        userlist | useremail | muserlist | museremail</b></code><br>
         A normal attribute can contain strings of any type. With this option,
         attributes can be forced to be numeric or to be a date/time, or to
         consist of a list of all users from the password file. When new logbook