diff --git a/nixos/doc/manual/from_md/release-notes/rl-2211.section.xml b/nixos/doc/manual/from_md/release-notes/rl-2211.section.xml
index 009b57bad86331e..686be4f9d45db5b 100644
--- a/nixos/doc/manual/from_md/release-notes/rl-2211.section.xml
+++ b/nixos/doc/manual/from_md/release-notes/rl-2211.section.xml
@@ -640,6 +640,12 @@
           guide</link> on how to migrate your Neo4j instance.
         </para>
       </listitem>
+      <listitem>
+        <para>
+          The <literal>networking.wireguard</literal> module now can set
+          the mtu on interfaces and tag its packets with an fwmark.
+        </para>
+      </listitem>
       <listitem>
         <para>
           The <literal>services.matrix-synapse</literal> systemd unit
diff --git a/nixos/doc/manual/release-notes/rl-2211.section.md b/nixos/doc/manual/release-notes/rl-2211.section.md
index b4e051a841fb3d0..a72c552f65741b8 100644
--- a/nixos/doc/manual/release-notes/rl-2211.section.md
+++ b/nixos/doc/manual/release-notes/rl-2211.section.md
@@ -215,6 +215,8 @@ Available as [services.patroni](options.html#opt-services.patroni.enable).
 
 - Neo4j was updated from version 3 to version 4. See this [migration guide](https://neo4j.com/docs/upgrade-migration-guide/current/) on how to migrate your Neo4j instance.
 
+- The `networking.wireguard` module now can set the mtu on interfaces and tag its packets with an fwmark.
+
 - The `services.matrix-synapse` systemd unit has been hardened.
 
 - Matrix Synapse now requires entries in the `state_group_edges` table to be unique, in order to prevent accidentally introducing duplicate information (for example, because a database backup was restored multiple times). If your Synapse database already has duplicate rows in this table, this could fail with an error and require manual remediation.