diff --git a/chapter08/systemd.xml b/chapter08/systemd.xml
index 2bb9fe04a..a97d73190 100644
--- a/chapter08/systemd.xml
+++ b/chapter08/systemd.xml
@@ -190,6 +190,14 @@ meson --prefix=/usr                 \
         </listitem>
       </varlistentry>
 
+      <varlistentry>
+        <term><parameter>-Dmode=release</parameter></term>
+        <listitem>
+          <para>Disable some features considered experimental by upstream.
+          </para>
+        </listitem>
+      </varlistentry>
+
     </variablelist>
 
     <para>Compile the package:</para>