diff --git a/xCAT-server/lib/xcat/plugins/ddns.pm b/xCAT-server/lib/xcat/plugins/ddns.pm
index 09c0e12b6..7dc8a72b9 100644
--- a/xCAT-server/lib/xcat/plugins/ddns.pm
+++ b/xCAT-server/lib/xcat/plugins/ddns.pm
@@ -874,6 +874,7 @@ sub add_or_delete_records {
             $ctx->{currnode}=$node;
             $ctx->{currname}=$name;
             $ctx->{currrevname}=$ip;
+            unless ($domain =~ /\.$/) { $domain = $domain.'.'; } #example.com becomes example.com.
             find_nameserver_for_dns($ctx,$revzone);
             find_nameserver_for_dns($ctx,$domain);
         }