diff --git a/target/linux/lantiq/patches-3.10/0204-lantiq-xrx200-duplex-fix.patch b/target/linux/lantiq/patches-3.10/0204-lantiq-xrx200-duplex-fix.patch
new file mode 100644
index 0000000000..92f0dcee78
--- /dev/null
+++ b/target/linux/lantiq/patches-3.10/0204-lantiq-xrx200-duplex-fix.patch
@@ -0,0 +1,13 @@
+--- a/drivers/net/ethernet/lantiq_xrx200.c
++++ b/drivers/net/ethernet/lantiq_xrx200.c
+@@ -101,8 +101,8 @@
+ #define MDIO_PHY_SPEED_M100	0x0800
+ #define MDIO_PHY_SPEED_G1	0x1000
+ 
+-#define MDIO_PHY_FDUP_EN	0x0600
+-#define MDIO_PHY_FDUP_DIS	0x0200
++#define MDIO_PHY_FDUP_EN	0x0200
++#define MDIO_PHY_FDUP_DIS	0x0600
+ 
+ #define MDIO_PHY_LINK_MASK	0x6000
+ #define MDIO_PHY_SPEED_MASK	0x1800