diff -up dhcp-4.2.0/client/dhclient.c.logpid dhcp-4.2.0/client/dhclient.c

--- dhcp-4.2.0/client/dhclient.c.logpid	2010-07-21 16:13:52.000000000 +0200

+++ dhcp-4.2.0/client/dhclient.c	2010-07-21 16:16:51.000000000 +0200

@@ -154,7 +154,7 @@ main(int argc, char **argv) {

 	else if (fd != -1)

 		close(fd);

-	openlog("dhclient", LOG_NDELAY, LOG_DAEMON);

+	openlog("dhclient", LOG_NDELAY | LOG_PID, LOG_DAEMON);

 #if !(defined(DEBUG) || defined(__CYGWIN32__))

 	setlogmask(LOG_UPTO(LOG_INFO));