diff --git a/ant/xdocs/properties.xml b/ant/xdocs/properties.xml
index 39e73686..70464625 100644
--- a/ant/xdocs/properties.xml
+++ b/ant/xdocs/properties.xml
@@ -108,5 +108,12 @@
         </tr>
       </table>
     </section>
+    <section name="Backward compatibility">
+      <p>In the version 1.10 of the ant plugin we removed the usage of the property "maven.ant.generatebuild.file" to replace it by the properties "maven.ant.generate.dir" and "maven.ant.generate.script".</p>
+      <p>If you used this property (for example you had : <code>maven.ant.generatebuild.file=myDir/myBuild.xml</code>) and you want to have a build which work with all the versions of this plugin you can set your properties like this :</p>
+      <source>maven.ant.generatebuild.file=${maven.ant.generate.dir}/${maven.ant.generate.script}
+maven.ant.generate.dir=myDir
+maven.ant.generate.script=myBuild.xml</source>
+    </section>
   </body>
 </document>