diff --git a/chapter09/networkd.xml b/chapter09/networkd.xml
index e7b876785..56d41a983 100644
--- a/chapter09/networkd.xml
+++ b/chapter09/networkd.xml
@@ -27,6 +27,17 @@
     of a static <filename>/etc/resolv.conf</filename> file. Both services are
     enabled by default.</para>
 
+    <note>
+      <para>
+        If you will not use <command>systemd-networkd</command> for network
+        configuration (for example, when the system is not connected to
+        network, or you want to use another utility like NetworkManager
+        for network configuration), disable a service to prevent an error
+        message during boot:
+      </para>
+      <screen role='nodump'><userinput>systemctl disable systemd-networkd-wait-online</userinput></screen>
+    </note>
+
     <para>Configuration files for <command>systemd-networkd</command> (and
     <command>systemd-resolved</command>) can be placed in
     <filename class="directory">/usr/lib/systemd/network</filename>