diff --git a/src/site/xdoc/userguide.xml b/src/site/xdoc/userguide.xml
index 1deff1ce42..18d5d8332e 100644
--- a/src/site/xdoc/userguide.xml
+++ b/src/site/xdoc/userguide.xml
@@ -40,7 +40,7 @@ This document highlights some key features to get you started.
       </ul>
     </li>
     <li><a href='#Bags'>Bags</a></li>
-    <li><a href="bloomFilters.html">Bloom filters</a></li>
+    <li><a href="bloomFilters.html">Bloom filters (starting in 4.5.0)</a></li>
   </ul>
 <subsection name='Note On Synchronization'>
   <p>