diff --git a/libc/kernel/arch-x86/asm/alternative.h b/libc/kernel/arch-x86/asm/alternative.h
index 107f551..35cd4f4 100644
--- a/libc/kernel/arch-x86/asm/alternative.h
+++ b/libc/kernel/arch-x86/asm/alternative.h
@@ -16,4 +16,9 @@
  ***
  ****************************************************************************
  ****************************************************************************/
+#ifdef __i386__
 #include "alternative_32.h"
+#else
+#include "alternative_64.h"
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#endif