diff --git a/xCAT-server/lib/xcat/plugins/ddns.pm b/xCAT-server/lib/xcat/plugins/ddns.pm
index 7b49bec3e..6d1969065 100644
--- a/xCAT-server/lib/xcat/plugins/ddns.pm
+++ b/xCAT-server/lib/xcat/plugins/ddns.pm
@@ -922,9 +922,10 @@ sub add_or_delete_records {
             $ctx->{currnode}=$node;
             $ctx->{currname}=$name;
             $ctx->{currrevname}=$ip;
-            unless ($domain =~ /\.$/) { $domain = $domain.'.'; } #example.com becomes example.com.
+            my $tmpdm;
+            unless ($domain =~ /\.$/) { $tmpdm = $domain.'.'; } #example.com becomes example.com.
             find_nameserver_for_dns($ctx,$revzone);
-            find_nameserver_for_dns($ctx,$domain);
+            find_nameserver_for_dns($ctx,$tmpdm);
         }
     }
     my $zone;