diff --git a/libc/kernel/arch-x86/asm/delay.h b/libc/kernel/arch-x86/asm/delay.h
new file mode 100644
index 0000000..7cb5f74
--- /dev/null
+++ b/libc/kernel/arch-x86/asm/delay.h
@@ -0,0 +1,19 @@
+/****************************************************************************
+ ****************************************************************************
+ ***
+ ***   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_X86_DELAY_H
+#define _ASM_X86_DELAY_H
+
+#define udelay(n) (__builtin_constant_p(n) ?   ((n) > 20000 ? __bad_udelay() : __const_udelay((n) * 0x10c7ul)) :   __udelay(n))
+
+#define ndelay(n) (__builtin_constant_p(n) ?   ((n) > 20000 ? __bad_ndelay() : __const_udelay((n) * 5ul)) :   __ndelay(n))
+
+#endif