Index: bpf.c
===================================================================
RCS file: /cvs/src/sys/net/bpf.c,v
retrieving revision 1.104
diff -u -p -r1.104 bpf.c
--- bpf.c	19 Sep 2014 02:52:55 -0000	1.104
+++ bpf.c	21 Sep 2014 11:41:27 -0000
@@ -1067,6 +1067,8 @@ bpfkqfilter(dev_t dev, struct knote *kn)
 	s = splnet();
 	D_GET(d);
 	SLIST_INSERT_HEAD(klist, kn, kn_selnext);
+	if (d->bd_rtout != -1 && d->bd_rdStart == 0)
+		d->bd_rdStart = ticks;
 	splx(s);
 
 	return (0);