diff --git a/nix/nixos-modules/astral/monitoring-node/prometheus.nix b/nix/nixos-modules/astral/monitoring-node/prometheus.nix
index a48d80ed..6602365c 100644
--- a/nix/nixos-modules/astral/monitoring-node/prometheus.nix
+++ b/nix/nixos-modules/astral/monitoring-node/prometheus.nix
@@ -17,7 +17,6 @@ in {
         port = 9558;
         extraFlags = [
           "--log.level=error"
-          "--systemd.collector.enable-file-descriptor-size"
           "--systemd.collector.enable-ip-accounting"
           "--systemd.collector.enable-restart-count"
         ];