diff --git a/chapter07/kernfs.xml b/chapter07/kernfs.xml
index 4757b257d..049f6e804 100644
--- a/chapter07/kernfs.xml
+++ b/chapter07/kernfs.xml
@@ -107,7 +107,7 @@ mount -vt tmpfs tmpfs $LFS/run</userinput></screen>
       we must explicitly mount a tmpfs:</para>
 
 <screen><userinput>if [ -h $LFS/dev/shm ]; then
-  mkdir -pv $LFS/$(readlink $LFS/dev/shm)
+  (cd $LFS/dev; mkdir $(readlink shm))
 else
   mount -vt tmpfs -o nosuid,nodev tmpfs $LFS/dev/shm
 fi</userinput></screen>