diff --git a/libc/kernel/arch-sh/asm/rtc.h b/libc/kernel/arch-sh/asm/rtc.h
new file mode 100644
index 0000000..ecc6f37
--- /dev/null
+++ b/libc/kernel/arch-sh/asm/rtc.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_RTC_H
+#define _ASM_RTC_H
+
+#define RTC_CAP_4_DIGIT_YEAR (1 << 0)
+
+struct sh_rtc_platform_info {
+ unsigned long capabilities;
+};
+
+#include <cpu/rtc.h>
+
+#endif