diff --git a/src/third_party/mac_headers/README b/src/third_party/mac_headers/README
index 3dccc49d..2b855b60 100644
--- a/src/third_party/mac_headers/README
+++ b/src/third_party/mac_headers/README
@@ -3,7 +3,6 @@ processes Mach-O files on Linux.
 
 From xnu-8792.41.9 (https://github.com/apple-oss-distributions/xnu at 5c2921b)
 i386/_types.h
-architecture/byte_order.h
 arm/_types.h
 mach/boolean.h
 mach/machine.h
@@ -21,3 +20,6 @@ mach-o/arch.h
 mach-o/fat.h
 mach-o/loader.h
 mach-o/nlist.h
+
+From architecture-282 (https://github.com/apple-oss-distributions/architecture at fe86900)
+architecture/byte_order.h
diff --git a/src/third_party/mac_headers/architecture/byte_order.h b/src/third_party/mac_headers/architecture/byte_order.h
index 8fb7f7e9..1f723ae1 100644
--- a/src/third_party/mac_headers/architecture/byte_order.h
+++ b/src/third_party/mac_headers/architecture/byte_order.h
@@ -1,24 +1,23 @@
 /*
- * Copyright (c) 1999-2002 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 1999-2008 Apple Computer, Inc. All rights reserved.
  *
  * @APPLE_LICENSE_HEADER_START@
- * 
- * "Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
- * Reserved.  This file contains Original Code and/or Modifications of
- * Original Code as defined in and that are subject to the Apple Public
- * Source License Version 1.0 (the 'License').  You may not use this file
- * except in compliance with the License.  Please obtain a copy of the
- * License at http://www.apple.com/publicsource and read it before using
- * this file.
- * 
+ *
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this
+ * file.
+ *
  * The Original Code and all software distributed under the License are
  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
- * License for the specific language governing rights and limitations
- * under the License."
- * 
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ *
  * @APPLE_LICENSE_HEADER_END@
  */
 /*
@@ -30,7 +29,7 @@
 
 #ifndef	_ARCHITECTURE_BYTE_ORDER_H_
 #define _ARCHITECTURE_BYTE_ORDER_H_
- 
+
 enum NXByteOrder {
     NX_UnknownByteOrder,
     NX_LittleEndian,