diff --git a/include/configs/at91rm9200dk.h b/include/configs/at91rm9200dk.h
index d971826..90cf8a2 100644
--- a/include/configs/at91rm9200dk.h
+++ b/include/configs/at91rm9200dk.h
@@ -112,6 +112,7 @@
 
 #define CONFIG_DRIVER_ETHER
 #define CONFIG_NET_RETRY_COUNT 20
+#define CONFIG_AT91C_USE_RMII
 
 #define CONFIG_HAS_DATAFLASH	1
 #define CFG_SPI_WRITE_TOUT	(5*CFG_HZ)