diff --git a/target/linux/ar71xx/files/arch/mips/ath79/mach-tl-mr11u.c b/target/linux/ar71xx/files/arch/mips/ath79/mach-tl-mr11u.c
index 7846b4f18d..4acb47942c 100644
--- a/target/linux/ar71xx/files/arch/mips/ath79/mach-tl-mr11u.c
+++ b/target/linux/ar71xx/files/arch/mips/ath79/mach-tl-mr11u.c
@@ -84,6 +84,8 @@ static void __init tl_mr11u_setup(void)
 	u8 *mac = (u8 *) KSEG1ADDR(0x1f01fc00);
 	u8 *ee = (u8 *) KSEG1ADDR(0x1fff1000);
 
+	ath79_setup_ar933x_phy4_switch(false, true);
+
 	ath79_register_m25p80(&tl_mr11u_flash_data);
 	ath79_register_leds_gpio(-1, ARRAY_SIZE(tl_mr11u_leds_gpio),
 				 tl_mr11u_leds_gpio);
@@ -99,6 +101,7 @@ static void __init tl_mr11u_setup(void)
 
 	ath79_register_mdio(0, 0x0);
 	ath79_register_eth(0);
+	ath79_eth0_data.phy_mask = BIT(0);
 
 	ath79_register_wmac(ee, mac);
 }