diff --git a/public/help/wiki_syntax_detailed.html b/public/help/wiki_syntax_detailed.html
index 0398e4fa0..38d5da38f 100644
--- a/public/help/wiki_syntax_detailed.html
+++ b/public/help/wiki_syntax_detailed.html
@@ -241,6 +241,12 @@ To go live, all you need to add is a database and a web server.
 <pre>
 {{toc}} => left aligned toc
 {{>toc}} => right aligned toc
+</pre>
+
+        <h3><a name="14" class="wiki-page"></a>Horizontal Rule</h3>
+
+<pre>
+---
 </pre>
 
     <h2><a name="12" class="wiki-page"></a>Macros</h2>