diff --git a/gump/xdocs/properties.xml b/gump/xdocs/properties.xml
index 9e2ec772..79a15920 100644
--- a/gump/xdocs/properties.xml
+++ b/gump/xdocs/properties.xml
@@ -76,6 +76,11 @@
             The default is the artifact ID of the project.
           </td>
         </tr>
+        <tr>
+          <td>maven.gump.svn.dir</td>
+          <td>Yes</td>
+          <td>If Subversion is used as SCM, set this property to define the directory to use (for example trunk).</td>
+        </tr>
       </table>
     </section>
   </body>