diff --git a/libc/kernel/arch-sh/asm/serial.h b/libc/kernel/arch-sh/asm/serial.h
new file mode 100644
index 0000000..ae59411
--- /dev/null
+++ b/libc/kernel/arch-sh/asm/serial.h
@@ -0,0 +1,23 @@
+/****************************************************************************
+ ****************************************************************************
+ ***
+ ***   This header was automatically generated from a Linux kernel header
+ ***   of the same name, to make information necessary for userspace to
+ ***   call into the kernel available to libc.  It contains only constants,
+ ***   structures, and macros generated from the original header, and thus,
+ ***   contains no copyrightable information.
+ ***
+ ****************************************************************************
+ ****************************************************************************/
+#ifndef _ASM_SERIAL_H
+#define _ASM_SERIAL_H
+
+#include <linux/kernel.h>
+
+#define BASE_BAUD ( 1843200 / 16 )
+
+#define STD_COM_FLAGS (ASYNC_BOOT_AUTOCONF | ASYNC_SKIP_TEST)
+
+#define SERIAL_PORT_DFNS
+
+#endif