diff --git a/machines/core-services-01/subZone.nix b/machines/core-services-01/subZone.nix
index 6bcf11d..2533dd8 100644
--- a/machines/core-services-01/subZone.nix
+++ b/machines/core-services-01/subZone.nix
@@ -37,7 +37,10 @@ with my.ipv6; # contains { standard, acme }
 
     builders.subdomains = lib.mapAttrs (n: AAAA: { inherit AAAA; }) remoteBuilders;
 
-    gdd.subdomains.backup.AAAA = [ "2001:470:1f13:187:350a:214a:639c:b97b" ];
+    gdd = {
+      NS = [ "ns1.gdd.${my.subZone}." ];
+      subdomains.ns1.AAAA = [ "2001:470:1f13:187:350a:214a:639c:b97b" ];
+    };
 
     acme = {
       NS = [ "acme.${my.subZone}." ];