diff --git a/machines/core-services-01/subZone.nix b/machines/core-services-01/subZone.nix
index f4a6ddf..9701a13 100644
--- a/machines/core-services-01/subZone.nix
+++ b/machines/core-services-01/subZone.nix
@@ -37,7 +37,7 @@ with my.ipv6; # contains { standard, acme }
 
     builders.subdomains = lib.mapAttrs (n: AAAA: { inherit AAAA; }) remoteBuilders;
 
-    gdd.subdomains.backup.AAAA = [ "2001:470:1f13:187:475:9fc1:1e84:4055" "2001:470:1f13:187:e8a5:fbff:fe29:42f5" ];
+    gdd.subdomains.backup.AAAA = [ "2001:470:1f13:187:475:9fc1:1e84:4055" "2001:470:1f13:187:e8a5:fbff:fe29:42f5" "2001:470:1f13:187:350a:214a:639c:b97b" ];
 
     acme = {
       NS = [ "acme.${my.subZone}." ];