--- /dev/null
+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));