diff --git a/sys/net80211/ieee80211_output.c b/sys/net80211/ieee80211_output.c
index 6020144ef7c..bcd3c2bdac5 100644
--- a/sys/net80211/ieee80211_output.c
+++ b/sys/net80211/ieee80211_output.c
@@ -2792,6 +2792,8 @@ ieee80211_beacon_update(struct ieee80211_node *ni,
 	struct ieee80211com *ic = ni->ni_ic;
 	int len_changed = 0;
 	uint16_t capinfo;
+	struct ieee80211_frame *wh;
+	ieee80211_seq seqno;
 
 	IEEE80211_LOCK(ic);
 	/*
@@ -2823,6 +2825,12 @@ ieee80211_beacon_update(struct ieee80211_node *ni,
 		return 1;		/* just assume length changed */
 	}
 
+	wh = mtod(m, struct ieee80211_frame *);
+	seqno = ni->ni_txseqs[IEEE80211_NONQOS_TID]++;
+	*(uint16_t *)&wh->i_seq[0] =
+		htole16(seqno << IEEE80211_SEQ_SEQ_SHIFT);
+	M_SEQNO_SET(m, seqno);
+
 	/* XXX faster to recalculate entirely or just changes? */
 	capinfo = ieee80211_getcapinfo(vap, ni->ni_chan);
 	*bo->bo_caps = htole16(capinfo);