diff --git a/lib/types/host.nix b/lib/types/host.nix
index a3037a7..ee26120 100644
--- a/lib/types/host.nix
+++ b/lib/types/host.nix
@@ -122,7 +122,7 @@ in rec {
           type = str;
           description =
             "Primary domain to which the host belongs, in the form of a domain name.";
-          default = "fudo.org";
+          default = "unassigned.domain";
         };
 
         extra-domains = mkOption {