diff --git a/xdoc/plugin.jelly b/xdoc/plugin.jelly
index 3209aed0..4ad7bc6c 100644
--- a/xdoc/plugin.jelly
+++ b/xdoc/plugin.jelly
@@ -720,8 +720,15 @@
     </j:forEach>
 
     <!-- Generate sitemap -->
-    <j:if test="${!nav.sitemap.isEmpty()}">
-        <attainGoal name="xdoc:sitemap-noinit"/>
+    <util:available file="${maven.docs.src}/${maven.xdoc.navigation.file}">
+      <util:file var="siteNavFile" name="${maven.docs.src}/${maven.xdoc.navigation.file}"/>
+    </util:available>
+    <j:set var="navFile" value="${siteNavFile}" />
+    <j:if test="${navFile != null}">
+      <x:parse var="navXML" xml="${navFile}"/>
+      <x:if select="$navXML/project/body/sitemap">
+          <attainGoal name="xdoc:sitemap-noinit"/>
+      </x:if>
     </j:if>
 
     <!-- Copy all generated files in an internationalize site structure, ie: