diff --git a/docs/XenMyWay.xml b/docs/XenMyWay.xml
index b0f4a1956..f553a390b 100644
--- a/docs/XenMyWay.xml
+++ b/docs/XenMyWay.xml
@@ -34,6 +34,12 @@
     </legalnotice>
   </articleinfo>
 
+  <caution>
+    <para>This article applies to Shorewall 3.0 and later. If you are running
+    a version of Shorewall earlier than Shorewall 3.0.0 then please see the
+    documentation for that release.</para>
+  </caution>
+
   <section>
     <title>Before Xen</title>