diff --git a/nixos/doc/manual/administration/container-networking.xml b/nixos/doc/manual/administration/container-networking.xml
index 4b977d1d82e..8aca329c8f1 100644
--- a/nixos/doc/manual/administration/container-networking.xml
+++ b/nixos/doc/manual/administration/container-networking.xml
@@ -52,4 +52,7 @@ $ ping -c1 10.233.4.2
 networking.networkmanager.unmanaged = [ "interface-name:ve-*" ];
 </programlisting>
  </para>
+ <para>
+  You may need to restart your system for the changes to take effect.
+ </para>
 </section>