diff --git a/hosts/NixNAS/filesystems.nix b/hosts/NixNAS/filesystems.nix
index 87309f9..98a37b7 100644
--- a/hosts/NixNAS/filesystems.nix
+++ b/hosts/NixNAS/filesystems.nix
@@ -3,12 +3,12 @@
     "/mnt/hdd" =
       { device = "/dev/disk/by-label/NixNAS_HDD";
         fsType = "btrfs";
-        options = [ "discard" ];
+        options = [ "discard" "subvol=@" ];
       };
     "/mnt/ssd" =
       { device = "/dev/disk/by-label/NixNAS_SSD";
         fsType = "btrfs";
         options = [ "discard" ];
       };
-  }
+  };
 }
\ No newline at end of file