diff --git a/include/configs/motionpro.h b/include/configs/motionpro.h
index b3f16d5..e6e3729 100644
--- a/include/configs/motionpro.h
+++ b/include/configs/motionpro.h
@@ -82,6 +82,7 @@
  * Ethernet configuration
  */
 #define CONFIG_MPC5xxx_FEC	1
+#define CONFIG_MPC5xxx_FEC_MII100
 #define CONFIG_PHY_ADDR		0x2
 #define CONFIG_PHY_TYPE		0x79c874
 #define CONFIG_RESET_PHY_R	1