diff --git a/hosts/matrix/synapse.nix b/hosts/matrix/synapse.nix
index 7025c42..4ebe8cd 100644
--- a/hosts/matrix/synapse.nix
+++ b/hosts/matrix/synapse.nix
@@ -1,5 +1,8 @@
 { config, ... }:
 
+let
+  fqdn = "matrix.${config.networking.domain}";
+in
 {
   imports = [
     ../../services/nginx.nix
@@ -11,7 +14,7 @@
       enable = true;
       settings = {
         server_name = config.networking.domain;
-        public_baseurl = "https://matrix.${config.networking.domain}:443/";
+        public_baseurl = "https://${fqdn}:443/";
         # "/var/lib/matrix-synapse/homeserver.signing.key"
         signing_key_path = config.age.secrets.matrix_signing_key.path;
         registration_shared_secret_path = config.age.secrets.matrix_registration_shared_secret.path;
@@ -67,7 +70,7 @@
       enableRegistrationScript = true;
     };
 
-    nginx.virtualHosts."matrix.${config.networking.domain}" = {
+    nginx.virtualHosts.${fqdn} = {
       default = true;
       quic = true;
       kTLS = true;