diff --git a/mt7915/mac.c b/mt7915/mac.c
index 63337373e..a96d90442 100644
--- a/mt7915/mac.c
+++ b/mt7915/mac.c
@@ -954,6 +954,9 @@ int mt7915_tx_prepare_skb(struct mt76_dev *mdev, void *txwi_ptr,
 	int id, i, nbuf = tx_info->nbuf - 1;
 	u8 *txwi = (u8 *)txwi_ptr;
 
+	if (unlikely(tx_info->skb->len <= ETH_HLEN))
+		return -EINVAL;
+
 	if (!wcid)
 		wcid = &dev->mt76.global_wcid;