diff --git a/Shorewall-Website/Shorewall_sfindex_frame.htm b/Shorewall-Website/Shorewall_sfindex_frame.htm
index 882aa7f73..396d6b22f 100644
--- a/Shorewall-Website/Shorewall_sfindex_frame.htm
+++ b/Shorewall-Website/Shorewall_sfindex_frame.htm
@@ -22,7 +22,7 @@
    <li> <a href="shorewall_features.htm">Features</a></li>
    <li> <a href="Shorewall_Doesnt.html">What&nbsp;it&nbsp;Cannot&nbsp;Do&nbsp;</a></li>
    <li> <a href="download.htm">Download</a></li>
-   <li> <a href="Install.html">Installation/<br />Upgrade</a></li>    
+   <li> <a href="Install.htm">Installation/<br />Upgrade</a></li>    
    <li> <a href="FAQ.htm"> FAQs </a></li>
    <li> <a href="Documentation_Index.html">Documentation</a></li>
    <li> <a href="errata.htm">Errata</a></li>