diff --git a/chapter06/systemd.xml b/chapter06/systemd.xml
index 867b6fdcf..9bd8fd6d0 100644
--- a/chapter06/systemd.xml
+++ b/chapter06/systemd.xml
@@ -52,6 +52,12 @@
 
 <screen><userinput remap="pre">sed '179,223d' -i src/resolve/meson.build</userinput></screen>
 
+    <para>Remove an unneeded group,
+    <systemitem class="groupname">render</systemitem>, from the default udev
+    rules:</para>
+
+<screen><userinput remap="pre">sed -i 's/GROUP="render", //' rules/50-udev-default.rules.in</userinput></screen>
+
     <para>Prepare systemd for compilation:</para>
 
     <screen><userinput remap="configure">mkdir -p build