Index: conf/upsmon.conf.sample.in
--- conf/upsmon.conf.sample.in.orig
+++ conf/upsmon.conf.sample.in
@@ -149,7 +149,7 @@ MINSUPPLIES 1
 # such as posting a message with 'logger' or 'wall' or 'mailx'. Do be careful
 # to plug the UPS back into the wall in a timely fashion.
 
-SHUTDOWNCMD "/sbin/shutdown -h +0"
+SHUTDOWNCMD "/sbin/shutdown -hp +0"
 
 # --------------------------------------------------------------------------
 # NOTIFYCMD <command>