diff --git a/content/posts/linux/Desktop-Linux-Hardening.md b/content/posts/linux/Desktop-Linux-Hardening.md
index 2a5d7ca..b1db5cf 100644
--- a/content/posts/linux/Desktop-Linux-Hardening.md
+++ b/content/posts/linux/Desktop-Linux-Hardening.md
@@ -249,6 +249,7 @@ If you are using KickSecure or Whonix, most of these hardening have already been
 Note that these configurations do not disable unprivileged user namespaces. There are also a few things in `/etc/modprobe.d/30_security-misc.conf` to keep in mind:
 - The `bluetooth` and `btusb` kernel modules are disabled by default. You need to comment out `install bluetooth /bin/disabled-bluetooth-by-security-misc` and `install btusb /bin/disabled-bluetooth-by-security-misc` if you want to use Bluetooth.
 - Apple filesystems are disabled by default. This is generally fine on non-Apple systems; however, if you are using Linux on an Apple product, you **must** check what filesystem your EFI partition uses. For example, if your EFI filesystem is HFS+, you need to comment out `install hfsplus /bin/disabled-filesys-by-security-misc`, otherwise your computer will not be able to boot into Linux.
+- The `cdrom` and `sr_mod` modules are only blacklisted by default. If you have no intention to ever use CD-ROM devices they should be disabled. To implement this, at the bottom of the configuration file 'uncomment' both install (disable) commands and 'comment out' both existing blacklist commands.
 
 ### Harding Boot Parameters