--- a/net/mac80211/rc80211_minstrel_ht.c
+++ b/net/mac80211/rc80211_minstrel_ht.c
@@ -408,7 +408,7 @@ minstrel_ht_tx_status(void *priv, struct
 	mi->ampdu_len += info->status.ampdu_len;
 
 	if (!mi->sample_wait && !mi->sample_tries && mi->sample_count > 0) {
-		mi->sample_wait = 4 + 2 * MINSTREL_TRUNC(mi->avg_ampdu_len);
+		mi->sample_wait = 8 + MINSTREL_TRUNC(mi->avg_ampdu_len);
 		mi->sample_tries = 3;
 		mi->sample_count--;
 	}