diff --git a/machines/koyomi/services/hypervisor.nix b/machines/koyomi/services/hypervisor.nix
index 70b9bd1..b58f046 100644
--- a/machines/koyomi/services/hypervisor.nix
+++ b/machines/koyomi/services/hypervisor.nix
@@ -61,7 +61,7 @@ in
       no-hosts = true; # do not resolve hosts from /etc/hosts
       no-resolv = true; # only use explicitly configured resolvers
 
-      domain = [ "sbruder.de" ];
+      domain = [ "koyomi.sbruder.de" ];
 
       enable-ra = true; # required to tell clients to use DHCPv6