diff --git a/nixos/doc/manual/release-notes/rl-1903.xml b/nixos/doc/manual/release-notes/rl-1903.xml
index a82724d7fb5..dddf4ed6016 100644
--- a/nixos/doc/manual/release-notes/rl-1903.xml
+++ b/nixos/doc/manual/release-notes/rl-1903.xml
@@ -64,6 +64,17 @@
        See: <xref linkend="sec-kubernetes"/> for details.
      </para>
    </listitem>
+   <listitem>
+     <para>
+       There is now a set of <option>confinement</option> options for
+       <option>systemd.services</option>, which allows to restrict services
+       into a <citerefentry>
+        <refentrytitle>chroot</refentrytitle>
+        <manvolnum>2</manvolnum>
+      </citerefentry>ed environment that only contains the store paths from
+      the runtime closure of the service.
+     </para>
+   </listitem>
   </itemizedlist>
  </section>