diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h
index 9963f81fea9a..1a0b6cf83ff1 100644
--- a/include/linux/serial_core.h
+++ b/include/linux/serial_core.h
@@ -150,6 +150,10 @@
 #define PORT_MCF	78
 
 
+/* MN10300 on-chip UART numbers */
+#define PORT_MN10300		80
+#define PORT_MN10300_CTS	81
+
 #ifdef __KERNEL__
 
 #include <linux/compiler.h>