diff --git a/target/linux/ar71xx/files/arch/mips/ar71xx/devices.c b/target/linux/ar71xx/files/arch/mips/ar71xx/devices.c
index d71e473c7..548a35e85 100644
--- a/target/linux/ar71xx/files/arch/mips/ar71xx/devices.c
+++ b/target/linux/ar71xx/files/arch/mips/ar71xx/devices.c
@@ -1051,9 +1051,9 @@ static int __init ar71xx_kmac_setup(char *str)
 __setup("kmac=", ar71xx_kmac_setup);
 
 void __init ar71xx_init_mac(unsigned char *dst, const unsigned char *src,
-			    unsigned offset)
+			    int offset)
 {
-	u32 t;
+	int t;
 
 	if (!is_valid_ether_addr(src)) {
 		memset(dst, '\0', ETH_ALEN);
diff --git a/target/linux/ar71xx/files/arch/mips/ar71xx/devices.h b/target/linux/ar71xx/files/arch/mips/ar71xx/devices.h
index 2553d17cf..b92e482a5 100644
--- a/target/linux/ar71xx/files/arch/mips/ar71xx/devices.h
+++ b/target/linux/ar71xx/files/arch/mips/ar71xx/devices.h
@@ -23,7 +23,7 @@ void ar71xx_add_device_spi(struct ar71xx_spi_platform_data *pdata,
 extern unsigned char ar71xx_mac_base[] __initdata;
 void ar71xx_parse_mac_addr(char *mac_str) __init;
 void ar71xx_init_mac(unsigned char *dst, const unsigned char *src,
-		     unsigned offset) __init;
+		     int offset) __init;
 
 struct ar71xx_eth_pll_data {
 	u32	pll_10;