diff --git a/ant/xdocs/properties.xml b/ant/xdocs/properties.xml
index ba81adfb..7c214169 100644
--- a/ant/xdocs/properties.xml
+++ b/ant/xdocs/properties.xml
@@ -66,6 +66,13 @@
             <i>&lt;empty&gt;</i>
           </td>
         </tr>
+        <tr>
+          <td>maven.ant.compatibility</td>
+          <td>Sets the compatibility for the generated script. Valid values are <code>1.5</code> or <code>1.6</code>. With Ant &gt;= 1.6 the user can define a user/password for proxy settings.</td>
+          <td>since 1.2</td>
+          <td>Yes</td>
+          <td>1.6</td>
+        </tr>
         <tr>
           <td>maven.ant.use.properties</td>
           <td>