diff --git a/mt7925/mac.c b/mt7925/mac.c
index 31b45dc6..167a9514 100644
--- a/mt7925/mac.c
+++ b/mt7925/mac.c
@@ -1636,6 +1636,10 @@ int mt7925_usb_sdio_tx_prepare_skb(struct mt76_dev *mdev, void *txwi_ptr,
 	if (!wcid)
 		wcid = &dev->mt76.global_wcid;
 
+	err = skb_cow_head(skb, MT_SDIO_TXD_SIZE + MT_SDIO_HDR_SIZE);
+	if (err)
+		return err;
+
 	if (sta) {
 		struct mt792x_sta *msta = (struct mt792x_sta *)sta->drv_priv;