diff --git a/include/linux/serial_8250.h b/include/linux/serial_8250.h
index f0c68d88b6f462cb8d7b40bd6864b17941461e4a..ba82c07feb95cbe8eb9e2362f49e4eadc5fcf04d 100644
--- a/include/linux/serial_8250.h
+++ b/include/linux/serial_8250.h
@@ -12,6 +12,7 @@
 #define _LINUX_SERIAL_8250_H
 
 #include <linux/serial_core.h>
+#include <linux/serial_reg.h>
 #include <linux/platform_device.h>
 
 /*