--- old/src/share/vm/oops/markOop.hpp	2010-11-10 13:15:23.000000000 +0100
+++ new/src/share/vm/oops/markOop.hpp	2010-11-10 13:15:23.000000000 +0100
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2008, 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_OOPS_MARKOOP_HPP
+#define SHARE_VM_OOPS_MARKOOP_HPP
+
+#include "oops/oop.hpp"
+
 // The markOop describes the header of an object.
 //
 // Note that the mark is not a real oop but just a word.
@@ -406,3 +411,5 @@
   }
 #endif // _LP64
 };
+
+#endif // SHARE_VM_OOPS_MARKOOP_HPP