diff --git a/config/default.nix b/config/default.nix
index f24fbdd7..26260482 100644
--- a/config/default.nix
+++ b/config/default.nix
@@ -227,7 +227,7 @@
       postgresql = lib.mkIf config.services.postgresql.enable {
         # default is 1024 which was not enough for mastodon and leading to errors like the following which crash postgresql:
         # could not close file "./global/176529": Too many open files
-        serviceConfig.LimitNOFile = toString 1024*32;
+        serviceConfig.LimitNOFile = 1024*32;
       };
     };