diff --git a/htdocs/BuildSystems.html b/htdocs/BuildSystems.html
index a36c163..8ac351c 100644
--- a/htdocs/BuildSystems.html
+++ b/htdocs/BuildSystems.html
@@ -813,6 +813,10 @@ module<a name="jskadsetup"></a></h4>
     We use JUnit for unit testing.&nbsp; See <a href="#installant">
     Installing Apache Ant</a> for full installation instructions.
   </li>
+  <li>
+    We also use <code>jdom.jar</code> from <a href="http://jdom.org/">
+    JDOM.org</a>.
+  </li>
 </ul>
 
 <p>