diff --git a/arch/arm/boot/dts/am335x-lxm.dts b/arch/arm/boot/dts/am335x-lxm.dts
index 7266a00aab2ea515397a9046942749cb291eb6d4..5c5667a3624dee614047e6b63efde568c063f431 100644
--- a/arch/arm/boot/dts/am335x-lxm.dts
+++ b/arch/arm/boot/dts/am335x-lxm.dts
@@ -328,6 +328,10 @@
 	dual_emac_res_vlan = <3>;
 };
 
+&phy_sel {
+	rmii-clock-ext;
+};
+
 &mac {
 	pinctrl-names = "default", "sleep";
 	pinctrl-0 = <&cpsw_default>;