diff --git a/poff b/poff
index 8b4dffc..9acfe91 100644
--- a/poff
+++ b/poff
@@ -60,7 +60,7 @@ esac
 
 # Get the PIDs of all the pppds running.  Could also get these from
 # /var/run, but pppd doesn't create .pid files until ppp is up.
-PIDS=`pidof pppd`
+PIDS=`pgrep ^pppd$`
 
 # poff is pointless if pppd isn't running.
 if test -z "$PIDS"; then