diff --git a/config/instances/config/mastodon.nix b/config/instances/config/mastodon.nix
index 71937a3..1846d79 100755
--- a/config/instances/config/mastodon.nix
+++ b/config/instances/config/mastodon.nix
@@ -17,6 +17,7 @@ in {
     path1 = "";
     path2 = "";
   };
+  subdomain = "social";
   ssl = {
     cert = "${sslPath}/${domain1}/fullchain.pem";
     key = "${sslPath}/${domain1}/key.pem";
diff --git a/nixos/modules/services/mastodon/default.nix b/nixos/modules/services/mastodon/default.nix
index eac2459..a00c814 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 = web.domains.url3;
+  host = "${mastodon.subdomain}.${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: