diff --git a/nixosConfigurations/hetzner-vpn2/headscale.nix b/nixosConfigurations/hetzner-vpn2/headscale.nix
index b7349bb..fd01241 100644
--- a/nixosConfigurations/hetzner-vpn2/headscale.nix
+++ b/nixosConfigurations/hetzner-vpn2/headscale.nix
@@ -16,7 +16,7 @@ in
       addSSL = true;
       enableACME = true;
       locations = {
-        "/".proxyPass = "http://localhost:" + headscale-port;
+        "/".proxyPass = "http://localhost:${headscale-port}";
       };
     };
   };