diff --git a/chapter06/util-linux.xml b/chapter06/util-linux.xml
index ba93f2825..0eb6748cf 100644
--- a/chapter06/util-linux.xml
+++ b/chapter06/util-linux.xml
@@ -49,7 +49,8 @@
     <command>hwclock</command> program FHS-compliant, run the
     following:</para>
 
-<screen><userinput remap="pre">sed -e 's@etc/adjtime@var/lib/hwclock/adjtime@g' -i $(grep -rl '/etc/adjtime' .)
+<screen><userinput remap="pre">sed -i -e 's@etc/adjtime@var/lib/hwclock/adjtime@g' \
+    $(grep -rl '/etc/adjtime' .)
 mkdir -pv /var/lib/hwclock</userinput></screen>
 
   </sect2>