diff --git a/nixos_modules/btrfs_scrub.nix b/nixos_modules/btrfs_scrub.nix
index 0eaf53d..e131095 100644
--- a/nixos_modules/btrfs_scrub.nix
+++ b/nixos_modules/btrfs_scrub.nix
@@ -8,7 +8,7 @@ let
     unique (attrValues (mapAttrs (_: v: v.device) btrfsFileSystems));
 in {
   services.btrfs.autoScrub = {
-    enable = true;
+    enable = btrfsDevices != [ ];
     fileSystems = btrfsDevices;
   };
 }