diff --git a/libc/kernel/arch-x86/asm/a.out.h b/libc/kernel/arch-x86/asm/a.out.h
new file mode 100644
index 0000000..6aecff7
--- /dev/null
+++ b/libc/kernel/arch-x86/asm/a.out.h
@@ -0,0 +1,31 @@
+/****************************************************************************
+ ****************************************************************************
+ ***
+ ***   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_A_OUT_H
+#define _ASM_X86_A_OUT_H
+
+struct exec
+{
+ unsigned int a_info;
+ unsigned a_text;
+ unsigned a_data;
+ unsigned a_bss;
+ unsigned a_syms;
+ unsigned a_entry;
+ unsigned a_trsize;
+ unsigned a_drsize;
+};
+
+#define N_TRSIZE(a) ((a).a_trsize)
+#define N_DRSIZE(a) ((a).a_drsize)
+#define N_SYMSIZE(a) ((a).a_syms)
+
+#endif