diff --git a/project.xml b/project.xml
index b16c39e..7d5c9f9 100644
--- a/project.xml
+++ b/project.xml
@@ -230,6 +230,18 @@ Runtime Optional.
       </properties>
     </dependency>
     
+    <dependency>
+      <groupId>maven</groupId>
+      <artifactId>maven-xdoc-plugin</artifactId>
+      <version>1.9.2</version>
+      <url>http://maven.apache.org/reference/plugins/xdoc/</url>
+      <type>plugin</type>
+      <properties>
+          <comment>
+              &lt;strong&gt;Site Only&lt;/strong&gt; - v1.9.2 (minimum)
+          </comment>
+      </properties>
+    </dependency>
   </dependencies>
   <build>
      <nagEmailAddress>commons-dev@jakarta.apache.org</nagEmailAddress>