diff --git a/include/configs/csb637.h b/include/configs/csb637.h
index 761c0dc..e1cdc7f 100644
--- a/include/configs/csb637.h
+++ b/include/configs/csb637.h
@@ -90,6 +90,7 @@
  */
 
 /* define one of these to choose the DBGU, USART0  or USART1 as console */
+#define CONFIG_AT91RM9200_USART
 #define CONFIG_DBGU
 #undef CONFIG_USART0
 #undef CONFIG_USART1