diff --git a/libc/kernel/arch-x86/asm/mman.h b/libc/kernel/arch-x86/asm/mman.h
new file mode 100644
index 0000000..7eda319
--- /dev/null
+++ b/libc/kernel/arch-x86/asm/mman.h
@@ -0,0 +1,30 @@
+/****************************************************************************
+ ****************************************************************************
+ ***
+ ***   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_MMAN_H
+#define _ASM_X86_MMAN_H
+
+#include <asm-generic/mman.h>
+
+#define MAP_32BIT 0x40  
+
+#define MAP_GROWSDOWN 0x0100  
+#define MAP_DENYWRITE 0x0800  
+#define MAP_EXECUTABLE 0x1000  
+#define MAP_LOCKED 0x2000  
+#define MAP_NORESERVE 0x4000  
+#define MAP_POPULATE 0x8000  
+#define MAP_NONBLOCK 0x10000  
+
+#define MCL_CURRENT 1  
+#define MCL_FUTURE 2  
+
+#endif