diff --git a/mt7996/mac.c b/mt7996/mac.c
index 98b1edde..3ddb8f78 100644
--- a/mt7996/mac.c
+++ b/mt7996/mac.c
@@ -1230,8 +1230,9 @@ mt7996_tx_check_aggr(struct ieee80211_link_sta *link_sta,
 	if (unlikely(fc != (IEEE80211_FTYPE_DATA | IEEE80211_STYPE_QOS_DATA)))
 		return;
 
-	if (!test_and_set_bit(tid, &wcid->ampdu_state))
-		ieee80211_start_tx_ba_session(link_sta->sta, tid, 0);
+	if (!test_and_set_bit(tid, &wcid->ampdu_state) &&
+	    ieee80211_start_tx_ba_session(link_sta->sta, tid, 0))
+		clear_bit(tid, &wcid->ampdu_state);
 }
 
 static void