diff --git a/mt7921/main.c b/mt7921/main.c
index 16477397..5bfa5d32 100644
--- a/mt7921/main.c
+++ b/mt7921/main.c
@@ -1402,6 +1402,8 @@ static void mt7921_sta_set_decap_offload(struct ieee80211_hw *hw,
 	struct mt7921_sta *msta = (struct mt7921_sta *)sta->drv_priv;
 	struct mt7921_dev *dev = mt7921_hw_dev(hw);
 
+	mt7921_mutex_acquire(dev);
+
 	if (enabled)
 		set_bit(MT_WCID_FLAG_HDR_TRANS, &msta->wcid.flags);
 	else
@@ -1409,6 +1411,8 @@ static void mt7921_sta_set_decap_offload(struct ieee80211_hw *hw,
 
 	mt76_connac_mcu_sta_update_hdr_trans(&dev->mt76, vif, &msta->wcid,
 					     MCU_UNI_CMD(STA_REC_UPDATE));
+
+	mt7921_mutex_release(dev);
 }
 
 #if IS_ENABLED(CONFIG_IPV6)