diff --git a/libc/kernel/common/linux/delay.h b/libc/kernel/common/linux/delay.h
new file mode 100644
index 0000000..e032b6f
--- /dev/null
+++ b/libc/kernel/common/linux/delay.h
@@ -0,0 +1,29 @@
+/****************************************************************************
+ ****************************************************************************
+ ***
+ ***   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 _LINUX_DELAY_H
+#define _LINUX_DELAY_H
+
+#include <asm/delay.h>
+
+#ifndef MAX_UDELAY_MS
+#define MAX_UDELAY_MS 5
+#endif
+
+#ifndef mdelay
+#define mdelay(n) (  (__builtin_constant_p(n) && (n)<=MAX_UDELAY_MS) ? udelay((n)*1000) :   ({unsigned long __ms=(n); while (__ms--) udelay(1000);}))
+#endif
+
+#ifndef ndelay
+#define ndelay(x) udelay(((x)+999)/1000)
+#endif
+
+#endif