diff --git a/appendixa/psmisc-desc.xml b/appendixa/psmisc-desc.xml
index 303fa7cfb..3030a4726 100644
--- a/appendixa/psmisc-desc.xml
+++ b/appendixa/psmisc-desc.xml
@@ -25,7 +25,10 @@ commands.</para>
 <sect3><title>pidof</title>
 
 <para>Pidof finds the process id's (pids) of the named programs and
-prints those id's on standard output.</para>
+prints those id's on standard output. If you want to use this pidof
+version (by default we use sysvinit's version which is more powerful),
+you will have to create pidof as a symlink manually that points to this
+package's killall program.</para>
 
 </sect3>