--- old/src/share/vm/libadt/port.hpp	2010-10-28 13:56:55.000000000 +0200
+++ new/src/share/vm/libadt/port.hpp	2010-10-28 13:56:55.000000000 +0200
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2009, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -22,6 +22,11 @@
  *
  */
 
+#ifndef SHARE_VM_LIBADT_PORT_HPP
+#define SHARE_VM_LIBADT_PORT_HPP
+
+#include "utilities/top.hpp"
+
 #ifndef _PORT_
 #define _PORT_
 // Typedefs for portable compiling
@@ -205,3 +210,5 @@
 extern uint32 heap_highwater;     // Highwater mark to date for memory usage
 
 #endif // _PORT_
+
+#endif // SHARE_VM_LIBADT_PORT_HPP