diff --git a/nixos/modules/services/mastodon/default.nix b/nixos/modules/services/mastodon/default.nix
index a00c814..6693a27 100755
--- a/nixos/modules/services/mastodon/default.nix
+++ b/nixos/modules/services/mastodon/default.nix
@@ -8,7 +8,7 @@
   inherit (flake.config.machines.devices) server;
   inherit (flake.config.services.instances) mastodon web;
   service = mastodon;
-  host = "${mastodon.subdomain}.${web.domains.url3}";
+  host = "${service.subdomain}.${web.domains.url3}";
   localhost = web.localhost.address0;
 in {
   # If you need to start fresh for some reason, run these to create the new Admin account: