$NetBSD: patch-config.h.in,v 1.1 2015/06/29 11:15:05 wiz Exp $

--- config.h.in.orig	2015-06-25 10:27:50.000000000 +0000
+++ config.h.in
@@ -102,6 +102,9 @@
 /* BSD AMD64 iopl */
 #undef USE_AMD64_IOPL
 
+/* BSD X86_64 iopl */
+#undef USE_X86_64_IOPL
+
 /* BSD /dev/io */
 #undef USE_DEV_IO