diff --git a/modules/forgejo/default.nix b/modules/forgejo/default.nix
index 4510bab..e3a0e86 100644
--- a/modules/forgejo/default.nix
+++ b/modules/forgejo/default.nix
@@ -73,15 +73,15 @@
         database.user = forgejo.user;
 
         settings.server = {
-          DOMAIN = lib.optionalString !(builtins.isNull cfg.subdomain) "${cfg.subdomain}."
-                   + config.aether.domain;
+          DOMAIN = lib.optionalString (!(builtins.isNull cfg.subdomain)) "${cfg.subdomain}."
+                     + config.aether.domain;
           ROOT_URL = "https://${srv.DOMAIN}/";
         };
       };
 
       systemd.tmpfiles.rules =
         lib.optional
-          !(builtins.isNull cfg.templates)
+          (!(builtins.isNull cfg.templates))
           "L+ ${cfg.stateDir}/custom/templates - - - - ${cfg.templates}";
     }
     // lib.mkIf cfg.createUser {