--- a/update-serial.pl	Fri Nov 05 10:04:48 2010 +0100
+++ b/update-serial.pl	Fri Nov 05 10:05:04 2010 +0100
@@ -180,6 +180,9 @@
 
   update-serial [-r] [-v] [file...]
 
+  update-serial -h|--help
+  update-serial -m|--man
+
 =head1 DESCRIPTION
 
 This script scans DNS (bind9 format) zone files and increments the
@@ -189,6 +192,12 @@
 
 =over
 
+=item B<-h>|B<--help>
+
+=item B<-m>|B<--man>
+
+Show the reference help / man page. (default: off)
+
 =item B<-r>|B<--reload>
 
 Automatically reload the bind (rndc reload) if some changes are applied.