diff --git a/doc/config.html b/doc/config.html
index 05ae5168..5a6ae1a6 100755
--- a/doc/config.html
+++ b/doc/config.html
@@ -201,7 +201,9 @@ this options can be used, to show a list of logbooks with guest access.
 <br>
 Normally, one can see the logbook selection page without having to log in. If one
 wants to require a login for the selection page, this switch can be set to
-<b><code>1</code></b>. Default is <b><code>0</code></b>.<p>
+<b><code>1</code></b>. Default is <b><code>0</code></b>. It is necessary to put the
+<code><b>Password file = ...</b></code> into the <i>[global]</i> section of the
+config file for this to work.<p>
 
 <LI><b><code>Expand Selection page = 0 | 1</code></b>
 <br>