diff --git a/xCAT-server/lib/xcat/plugins/ddns.pm b/xCAT-server/lib/xcat/plugins/ddns.pm
index 03cd0b133..88424638f 100644
--- a/xCAT-server/lib/xcat/plugins/ddns.pm
+++ b/xCAT-server/lib/xcat/plugins/ddns.pm
@@ -901,6 +901,7 @@ 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);
         }