diff --git a/target/linux/ramips/files/drivers/net/ethernet/ralink/mtk_eth_soc.c b/target/linux/ramips/files/drivers/net/ethernet/ralink/mtk_eth_soc.c
index c741c85f4a5..03e65a0c8a6 100644
--- a/target/linux/ramips/files/drivers/net/ethernet/ralink/mtk_eth_soc.c
+++ b/target/linux/ramips/files/drivers/net/ethernet/ralink/mtk_eth_soc.c
@@ -152,7 +152,7 @@ static inline void fe_int_enable(u32 mask)
 	fe_reg_r32(FE_REG_FE_INT_ENABLE);
 }
 
-static inline void fe_hw_set_macaddr(struct fe_priv *priv, unsigned char *mac)
+static inline void fe_hw_set_macaddr(struct fe_priv *priv, const unsigned char *mac)
 {
 	unsigned long flags;
 
diff --git a/target/linux/ramips/files/drivers/net/ethernet/ralink/mtk_eth_soc.h b/target/linux/ramips/files/drivers/net/ethernet/ralink/mtk_eth_soc.h
index 7b291ff43e5..364dd54a58f 100644
--- a/target/linux/ramips/files/drivers/net/ethernet/ralink/mtk_eth_soc.h
+++ b/target/linux/ramips/files/drivers/net/ethernet/ralink/mtk_eth_soc.h
@@ -378,7 +378,7 @@ struct fe_soc_data {
 	const u16 *reg_table;
 
 	void (*init_data)(struct fe_soc_data *data, struct net_device *netdev);
-	void (*set_mac)(struct fe_priv *priv, unsigned char *mac);
+	void (*set_mac)(struct fe_priv *priv, const unsigned char *mac);
 	int (*fwd_config)(struct fe_priv *priv);
 	void (*tx_dma)(struct fe_tx_dma *txd);
 	int (*switch_init)(struct fe_priv *priv);
diff --git a/target/linux/ramips/files/drivers/net/ethernet/ralink/soc_mt7620.c b/target/linux/ramips/files/drivers/net/ethernet/ralink/soc_mt7620.c
index 172dda11b75..e2b2aceff95 100644
--- a/target/linux/ramips/files/drivers/net/ethernet/ralink/soc_mt7620.c
+++ b/target/linux/ramips/files/drivers/net/ethernet/ralink/soc_mt7620.c
@@ -107,7 +107,7 @@ static int mt7620_gsw_config(struct fe_priv *priv)
 	return 0;
 }
 
-static void mt7620_set_mac(struct fe_priv *priv, unsigned char *mac)
+static void mt7620_set_mac(struct fe_priv *priv, const unsigned char *mac)
 {
 	struct mt7620_gsw *gsw = (struct mt7620_gsw *)priv->soc->swpriv;
 	unsigned long flags;
diff --git a/target/linux/ramips/files/drivers/net/ethernet/ralink/soc_rt3050.c b/target/linux/ramips/files/drivers/net/ethernet/ralink/soc_rt3050.c
index 435f0074778..3f961797ed4 100644
--- a/target/linux/ramips/files/drivers/net/ethernet/ralink/soc_rt3050.c
+++ b/target/linux/ramips/files/drivers/net/ethernet/ralink/soc_rt3050.c
@@ -76,7 +76,7 @@ static void rt5350_init_data(struct fe_soc_data *data,
 	netdev->hw_features = NETIF_F_SG | NETIF_F_RXCSUM;
 }
 
-static void rt5350_set_mac(struct fe_priv *priv, unsigned char *mac)
+static void rt5350_set_mac(struct fe_priv *priv, const unsigned char *mac)
 {
 	unsigned long flags;