--- xnu/xnu-792.6.56/libkern/c++/OSUnserialize.cpp
+++ xnu/xnu-517/libkern/c++/OSUnserialize.cpp
@@ -2,6 +2,8 @@
  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
  *
  * @APPLE_LICENSE_HEADER_START@
+ * 
+ * Copyright (c) 1999-2003 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
@@ -1566,7 +1568,7 @@
 	OSObject *object;
 
 	if (!lock) {
-		lock = mutex_alloc(0);
+		lock = mutex_alloc(ETAP_IO_AHA);
 		mutex_lock(lock);
 	} else {
 		mutex_lock(lock);