diff --git a/hadoop-project/src/site/site.xml b/hadoop-project/src/site/site.xml
index 80bb2e1b69b..4de5ec8eccf 100644
--- a/hadoop-project/src/site/site.xml
+++ b/hadoop-project/src/site/site.xml
@@ -77,6 +77,7 @@
       <item name="Commands Reference" href="hadoop-project-dist/hadoop-hdfs/HDFSCommands.html"/>
       <item name="NameNode HA With QJM" href="hadoop-project-dist/hadoop-hdfs/HDFSHighAvailabilityWithQJM.html"/>
       <item name="NameNode HA With NFS" href="hadoop-project-dist/hadoop-hdfs/HDFSHighAvailabilityWithNFS.html"/>
+      <item name="Observer NameNode" href="hadoop-project-dist/hadoop-hdfs/ObserverNameNode.html"/>
       <item name="Federation" href="hadoop-project-dist/hadoop-hdfs/Federation.html"/>
       <item name="ViewFs" href="hadoop-project-dist/hadoop-hdfs/ViewFs.html"/>
       <item name="Snapshots" href="hadoop-project-dist/hadoop-hdfs/HdfsSnapshots.html"/>