--- old/src/cpu/zero/vm/stack_zero.hpp	2010-11-10 12:59:41.000000000 +0100
+++ new/src/cpu/zero/vm/stack_zero.hpp	2010-11-10 12:59:40.000000000 +0100
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2003, 2007, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
  * Copyright 2008, 2009, 2010 Red Hat, Inc.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
@@ -23,6 +23,11 @@
  *
  */
 
+#ifndef CPU_ZERO_VM_STACK_ZERO_HPP
+#define CPU_ZERO_VM_STACK_ZERO_HPP
+
+#include "utilities/sizes.hpp"
+
 class ZeroStack {
  private:
   intptr_t *_base; // the last available word
@@ -217,3 +222,5 @@
                         char*     fieldbuf,
                         int       buflen) const;
 };
+
+#endif // CPU_ZERO_VM_STACK_ZERO_HPP