diff --git a/target/linux/ar71xx/files/drivers/net/ethernet/atheros/ag71xx/ag71xx.h b/target/linux/ar71xx/files/drivers/net/ethernet/atheros/ag71xx/ag71xx.h
index f3f9f14801..b0df017571 100644
--- a/target/linux/ar71xx/files/drivers/net/ethernet/atheros/ag71xx/ag71xx.h
+++ b/target/linux/ar71xx/files/drivers/net/ethernet/atheros/ag71xx/ag71xx.h
@@ -51,8 +51,6 @@
 #define AG71XX_INT_INIT	(AG71XX_INT_ERR | AG71XX_INT_POLL)
 
 #define AG71XX_TX_MTU_LEN	1540
-#define AG71XX_RX_PKT_SIZE	\
-	(ETH_FRAME_LEN + ETH_FCS_LEN + VLAN_HLEN)
 
 #define AG71XX_TX_RING_SIZE_DEFAULT	32
 #define AG71XX_RX_RING_SIZE_DEFAULT	128
diff --git a/target/linux/ar71xx/files/drivers/net/ethernet/atheros/ag71xx/ag71xx_main.c b/target/linux/ar71xx/files/drivers/net/ethernet/atheros/ag71xx/ag71xx_main.c
index 04e1e586c2..622ffed1ea 100644
--- a/target/linux/ar71xx/files/drivers/net/ethernet/atheros/ag71xx/ag71xx_main.c
+++ b/target/linux/ar71xx/files/drivers/net/ethernet/atheros/ag71xx/ag71xx_main.c
@@ -609,7 +609,7 @@ static int ag71xx_open(struct net_device *dev)
 	struct ag71xx *ag = netdev_priv(dev);
 	int ret;
 
-	ag->rx_buf_size = AG71XX_RX_PKT_SIZE + NET_SKB_PAD + NET_IP_ALIGN;
+	ag->rx_buf_size = ag->max_frame_len + NET_SKB_PAD + NET_IP_ALIGN;
 
 	ret = ag71xx_rings_init(ag);
 	if (ret)