diff --git a/nixos/doc/manual/release-notes/rl-2405.section.md b/nixos/doc/manual/release-notes/rl-2405.section.md
index 09360366d7a0b30..f4a242ff0592e7a 100644
--- a/nixos/doc/manual/release-notes/rl-2405.section.md
+++ b/nixos/doc/manual/release-notes/rl-2405.section.md
@@ -280,6 +280,8 @@ The pre-existing [services.ankisyncd](#opt-services.ankisyncd.enable) has been m
 
 - `services.neo4j.allowUpgrade` was removed and no longer has any effect. Neo4j 5 supports automatic rolling upgrades.
 
+- `frr` was updated to 10.0, which introduces the default of `enforce-first-as` for BGP. Please disable again if needed.
+
 - `unifiLTS`, `unifi5` and `unifi6` have been removed, as they require MongoDB versions which are end-of-life. All these versions can be upgraded to `unifi7` directly.
 
 - `mongodb-4_4` has been removed as it has reached end of life. Consequently, `unifi7` and `unifi8` now use MongoDB 5.0 by default.