--- a/sys/netproto/802_11/wlan/ieee80211_ht.c
+++ b/sys/netproto/802_11/wlan/ieee80211_ht.c
@@ -1245,6 +1245,7 @@ ieee80211_ht_wds_init(struct ieee80211_node *ni)
 	for (tid = 0; tid < WME_NUM_TID; tid++) {
 		tap = &ni->ni_tx_ampdu[tid];
 		tap->txa_tid = tid;
+		tap->txa_ni = ni;	/* needed by addba/bar timeouts */
 		ieee80211_txampdu_init_pps(tap);
 	}
 	/* NB: AMPDU tx/rx governed by IEEE80211_FHT_AMPDU_{TX,RX} */