diff --git a/nixos/doc/manual/release-notes/rl-2105.xml b/nixos/doc/manual/release-notes/rl-2105.xml
index 9894ab025000..2f6600b38914 100644
--- a/nixos/doc/manual/release-notes/rl-2105.xml
+++ b/nixos/doc/manual/release-notes/rl-2105.xml
@@ -100,6 +100,12 @@
      <link linkend="sec-custom-ifnames">Assigning custom names</link> section
      of the NixOS manual for an example using networkd links.
     </para>
+   </listitem>
+   <listitem>
+    <para>
+     The <option>security.hideProcessInformation</option> module has been removed.
+     It was broken since the switch to cgroups-v2.
+    </para>
    </listitem>
     <listitem>
       <para>