diff --git a/hosts/sid/services/nginx.nix b/hosts/sid/services/nginx.nix
index a1ec0ce..eb0b3d5 100644
--- a/hosts/sid/services/nginx.nix
+++ b/hosts/sid/services/nginx.nix
@@ -60,7 +60,7 @@ in
       forceSSL = ssl;
       useACMEHost = "sid-internal";
       locations."/" = {
-        proxyPass = "http://${constants.hosts.rx4.ip}:${constants.services.vaultwarden.port}";
+        proxyPass = "http://${constants.hosts.rx4.ip}:${toString constants.services.vaultwarden.port}";
       };
     };
     virtualHosts."${constants.services.webdav.fqdn}" = mkVirtualHost {