diff --git a/[refs] b/[refs]
index 123b1c4e5307..f3499e60d405 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 730bd83b036e72b0134352ca27e76ea08475fbf1
+refs/heads/master: 15d46f38df87f89242e470f5797120fa384c1fc3
diff --git a/trunk/net/mac80211/rc80211_minstrel_ht.c b/trunk/net/mac80211/rc80211_minstrel_ht.c
index c5b465904e3b..2a18d6602d4a 100644
--- a/trunk/net/mac80211/rc80211_minstrel_ht.c
+++ b/trunk/net/mac80211/rc80211_minstrel_ht.c
@@ -397,8 +397,9 @@ minstrel_ht_tx_status(void *priv, struct ieee80211_supported_band *sband,
 	    !(info->flags & IEEE80211_TX_STAT_AMPDU))
 		return;
 
-	if (!info->status.ampdu_len) {
-		info->status.ampdu_ack_len = 1;
+	if (!(info->flags & IEEE80211_TX_STAT_AMPDU)) {
+		info->status.ampdu_ack_len =
+			(info->flags & IEEE80211_TX_STAT_ACK ? 1 : 0);
 		info->status.ampdu_len = 1;
 	}
 
@@ -426,7 +427,7 @@ minstrel_ht_tx_status(void *priv, struct ieee80211_supported_band *sband,
 		group = minstrel_ht_get_group_idx(&ar[i]);
 		rate = &mi->groups[group].rates[ar[i].idx % 8];
 
-		if (last && (info->flags & IEEE80211_TX_STAT_ACK))
+		if (last)
 			rate->success += info->status.ampdu_ack_len;
 
 		rate->attempts += ar[i].count * info->status.ampdu_len;