diff --git a/Documentation.html b/Documentation.html
index f92eafb47..05cdc8b0b 100644
--- a/Documentation.html
+++ b/Documentation.html
@@ -1901,7 +1901,7 @@ setfacl -d -m "g:www-data:rwx" tmp
         changes to display a query box.<br /><br />
 
         The size of this query window can be customized with
-        <tt>$cfg['QueryWindowWidth']</tt> and <tt>$cfg['QueryWindowWidth']</tt>
+        <tt>$cfg['QueryWindowWidth']</tt> and <tt>$cfg['QueryWindowHeight']</tt>
         - both integers for the size in pixels. Note that normally, those
         parameters will be modified in <tt>layout.inc.php</tt> for the
         theme you are using.<br /><br />