diff --git a/target/linux/ar71xx/files/arch/mips/ar71xx/mach-dir-600-a1.c b/target/linux/ar71xx/files/arch/mips/ar71xx/mach-dir-600-a1.c
index bb59dfb7a7..c076489bfb 100644
--- a/target/linux/ar71xx/files/arch/mips/ar71xx/mach-dir-600-a1.c
+++ b/target/linux/ar71xx/files/arch/mips/ar71xx/mach-dir-600-a1.c
@@ -140,6 +140,7 @@ static void __init dir_600_a1_setup(void)
 	ar71xx_eth0_data.phy_if_mode = PHY_INTERFACE_MODE_RMII;
 	ar71xx_eth0_data.speed = SPEED_100;
 	ar71xx_eth0_data.duplex = DUPLEX_FULL;
+	ar71xx_eth0_data.phy_mask = BIT(4);
 
 	/* LAN ports */
 	ar71xx_eth1_data.phy_if_mode = PHY_INTERFACE_MODE_RMII;
diff --git a/target/linux/ar71xx/files/arch/mips/ar71xx/mach-rb750.c b/target/linux/ar71xx/files/arch/mips/ar71xx/mach-rb750.c
index 5ed383f942..547ad12d3f 100644
--- a/target/linux/ar71xx/files/arch/mips/ar71xx/mach-rb750.c
+++ b/target/linux/ar71xx/files/arch/mips/ar71xx/mach-rb750.c
@@ -124,6 +124,7 @@ static void __init rb750_setup(void)
 	ar71xx_eth0_data.phy_if_mode = PHY_INTERFACE_MODE_RMII;
 	ar71xx_eth0_data.speed = SPEED_100;
 	ar71xx_eth0_data.duplex = DUPLEX_FULL;
+	ar71xx_eth0_data.phy_mask = BIT(4);
 
 	/* LAN ports */
 	ar71xx_eth1_data.phy_if_mode = PHY_INTERFACE_MODE_RMII;
diff --git a/target/linux/ar71xx/files/arch/mips/ar71xx/mach-tl-mr3x20.c b/target/linux/ar71xx/files/arch/mips/ar71xx/mach-tl-mr3x20.c
index 7e8ab4c21f..8bf853b83c 100644
--- a/target/linux/ar71xx/files/arch/mips/ar71xx/mach-tl-mr3x20.c
+++ b/target/linux/ar71xx/files/arch/mips/ar71xx/mach-tl-mr3x20.c
@@ -130,6 +130,7 @@ static void __init tl_mr3x20_setup(void)
 	ar71xx_eth0_data.phy_if_mode = PHY_INTERFACE_MODE_RMII;
 	ar71xx_eth0_data.speed = SPEED_100;
 	ar71xx_eth0_data.duplex = DUPLEX_FULL;
+	ar71xx_eth0_data.phy_mask = BIT(4);
 
 	/* LAN ports */
 	ar71xx_eth1_data.phy_if_mode = PHY_INTERFACE_MODE_RMII;
diff --git a/target/linux/ar71xx/files/arch/mips/ar71xx/mach-tl-wr741nd.c b/target/linux/ar71xx/files/arch/mips/ar71xx/mach-tl-wr741nd.c
index 24f7272885..909327ac75 100644
--- a/target/linux/ar71xx/files/arch/mips/ar71xx/mach-tl-wr741nd.c
+++ b/target/linux/ar71xx/files/arch/mips/ar71xx/mach-tl-wr741nd.c
@@ -115,6 +115,7 @@ static void __init tl_wr741nd_setup(void)
 	ar71xx_eth0_data.phy_if_mode = PHY_INTERFACE_MODE_RMII;
 	ar71xx_eth0_data.speed = SPEED_100;
 	ar71xx_eth0_data.duplex = DUPLEX_FULL;
+	ar71xx_eth0_data.phy_mask = BIT(4);
 
 	/* LAN ports */
 	ar71xx_eth1_data.phy_if_mode = PHY_INTERFACE_MODE_RMII;