diff --git a/nixos/modules/services/monitoring/prometheus/exporters/smartctl.nix b/nixos/modules/services/monitoring/prometheus/exporters/smartctl.nix
index bac98364538d..6fa03b5380c4 100644
--- a/nixos/modules/services/monitoring/prometheus/exporters/smartctl.nix
+++ b/nixos/modules/services/monitoring/prometheus/exporters/smartctl.nix
@@ -50,7 +50,7 @@ in {
         "CAP_SYS_ADMIN"
       ];
       DevicePolicy = "closed";
-      DeviceAllow = lib.mkOverride 100 (
+      DeviceAllow = lib.mkOverride 50 (
         if cfg.devices != [] then
           cfg.devices
         else [