diff --git a/drivers/net/wireless/mediatek/mt76/mt7996/mac.c b/drivers/net/wireless/mediatek/mt76/mt7996/mac.c
index ce4242f90e9f..96ced4c039ce 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7996/mac.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7996/mac.c
@@ -469,7 +469,7 @@ static int mt7996_reverse_frag0_hdr_trans(struct sk_buff *skb, u16 hdr_gap)
 		ether_addr_copy(hdr.addr4, eth_hdr->h_source);
 		break;
 	default:
-		break;
+		return -EINVAL;
 	}
 
 	skb_pull(skb, hdr_gap + sizeof(struct ethhdr) - 2);