diff --git a/package/kernel/mac80211/patches/subsys/377-mac80211-minstrel_ht-fix-sample-time-check.patch b/package/kernel/mac80211/patches/subsys/377-mac80211-minstrel_ht-fix-sample-time-check.patch
new file mode 100644
index 00000000000..787254b4df3
--- /dev/null
+++ b/package/kernel/mac80211/patches/subsys/377-mac80211-minstrel_ht-fix-sample-time-check.patch
@@ -0,0 +1,23 @@
+From: Felix Fietkau <nbd@nbd.name>
+Date: Thu, 17 Jun 2021 12:05:54 +0200
+Subject: [PATCH] mac80211: minstrel_ht: fix sample time check
+
+We need to skip sampling if the next sample time is after jiffies, not before.
+This patch fixes an issue where in some cases only very little sampling (or none
+at all) is performed, leading to really bad data rates
+
+Fixes: 80d55154b2f8 ("mac80211: minstrel_ht: significantly redesign the rate probing strategy")
+Signed-off-by: Felix Fietkau <nbd@nbd.name>
+---
+
+--- a/net/mac80211/rc80211_minstrel_ht.c
++++ b/net/mac80211/rc80211_minstrel_ht.c
+@@ -1498,7 +1498,7 @@ minstrel_ht_get_rate(void *priv, struct
+ 	    (info->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO))
+ 		return;
+ 
+-	if (time_is_before_jiffies(mi->sample_time))
++	if (time_is_after_jiffies(mi->sample_time))
+ 		return;
+ 
+ 	mi->sample_time = jiffies + MINSTREL_SAMPLE_INTERVAL;