diff --git a/sdio_txrx.c b/sdio_txrx.c
index bfc4de50..ddd8c0cc 100644
--- a/sdio_txrx.c
+++ b/sdio_txrx.c
@@ -254,6 +254,10 @@ static int mt76s_tx_run_queue(struct mt76_dev *dev, struct mt76_queue *q)
 
 		if (!test_bit(MT76_STATE_MCU_RUNNING, &dev->phy.state)) {
 			__skb_put_zero(e->skb, 4);
+			err = __skb_grow(e->skb, roundup(e->skb->len,
+							 sdio->func->cur_blksize));
+			if (err)
+				return err;
 			err = __mt76s_xmit_queue(dev, e->skb->data,
 						 e->skb->len);
 			if (err)