diff --git a/libc/kernel/arch-x86/asm/io.h b/libc/kernel/arch-x86/asm/io.h
index 4e81b8c..5ea43c2 100644
--- a/libc/kernel/arch-x86/asm/io.h
+++ b/libc/kernel/arch-x86/asm/io.h
@@ -16,4 +16,9 @@
  ***
  ****************************************************************************
  ****************************************************************************/
+#ifdef __i386__
 #include "io_32.h"
+#else
+#include "io_64.h"
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#endif