diff --git a/sys/net/bpf.c b/sys/net/bpf.c
--- a/sys/net/bpf.c
+++ b/sys/net/bpf.c
@@ -2265,6 +2265,7 @@
 static int
 bpf_gettime(struct bintime *bt, int tstype, struct mbuf *m)
 {
+	struct timespec ts;
 	struct m_tag *tag;
 	int quality;
 
@@ -2273,6 +2274,11 @@
 		return (quality);
 
 	if (m != NULL) {
+		if ((m->m_flags & (M_PKTHDR | M_TSTMP)) == (M_PKTHDR | M_TSTMP)) {
+			mbuf_tstmp2timespec(m, &ts);
+			timespec2bintime(&ts, bt);
+			return (BPF_TSTAMP_EXTERN);
+		}
 		tag = m_tag_locate(m, MTAG_BPF, MTAG_BPF_TIMESTAMP, NULL);
 		if (tag != NULL) {
 			*bt = *(struct bintime *)(tag + 1);