diff --git a/nixos/doc/manual/release-notes/rl-2105.xml b/nixos/doc/manual/release-notes/rl-2105.xml
index 6e4a9e7114b0..99e0110fdcbf 100644
--- a/nixos/doc/manual/release-notes/rl-2105.xml
+++ b/nixos/doc/manual/release-notes/rl-2105.xml
@@ -348,6 +348,15 @@
      which is the new stable release.  OpenAFS 1.6 was removed.
     </para>
    </listitem>
+   <listitem>
+    <para>
+     The WireGuard module gained a new option
+     <option>networking.wireguard.interfaces.&lt;name&gt;.peers.*.dynamicEndpointRefreshSeconds</option>
+     that implements refreshing the IP of DNS-based endpoints periodically
+     (which WireGuard itself
+     <link xlink:href="https://lists.zx2c4.com/pipermail/wireguard/2017-November/002028.html">cannot do</link>).
+    </para>
+   </listitem>
    <listitem>
     <para>
      MariaDB has been updated to 10.5.