diff --git a/nixos/doc/manual/release-notes/rl-2405.section.md b/nixos/doc/manual/release-notes/rl-2405.section.md
index 044744988a02..af8714f47d34 100644
--- a/nixos/doc/manual/release-notes/rl-2405.section.md
+++ b/nixos/doc/manual/release-notes/rl-2405.section.md
@@ -269,6 +269,8 @@ The pre-existing [services.ankisyncd](#opt-services.ankisyncd.enable) has been m
 
 - `mongodb-4_4` has been removed as it has reached end of life. Consequently, `unifi7` and `unifi8` now use MongoDB 5.0 by default.
 
+- `mongodb-5_0` and newer requires a cpu with the avx instruction set to run.
+
 - `nitter` requires a `guest_accounts.jsonl` to be provided as a path or loaded into the default location at `/var/lib/nitter/guest_accounts.jsonl`. See [Guest Account Branch Deployment](https://github.com/zedeus/nitter/wiki/Guest-Account-Branch-Deployment) for details.
 
 - `boot.supportedFilesystems` and `boot.initrd.supportedFilesystems` are now attribute sets instead of lists. Assignment from lists as done previously is still supported, but checking whether a filesystem is enabled must now by done using `supportedFilesystems.fs or false` instead of using `lib.elem "fs" supportedFilesystems` as was done previously.