diff --git a/sys/netpfil/ipfw/dn_sched_fq_pie.c b/sys/netpfil/ipfw/dn_sched_fq_pie.c
--- a/sys/netpfil/ipfw/dn_sched_fq_pie.c
+++ b/sys/netpfil/ipfw/dn_sched_fq_pie.c
@@ -744,6 +744,9 @@
 	}
 
 	if (t != DROP) {
+		if (m->m_pkthdr.rcvif != NULL)
+			m_rcvif_serialize(m);
+
 		mq_append(&q->mq, m);
 		fq_update_stats(q, si, len, 0);
 		return 0;