--- old/src/share/vm/asm/register.hpp	2010-11-10 13:04:23.000000000 +0100
+++ new/src/share/vm/asm/register.hpp	2010-11-10 13:04:22.000000000 +0100
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000, 2002, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2000, 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_ASM_REGISTER_HPP
+#define SHARE_VM_ASM_REGISTER_HPP
+
+#include "utilities/top.hpp"
+
 // Use AbstractRegister as shortcut
 class AbstractRegisterImpl;
 typedef AbstractRegisterImpl* AbstractRegister;
@@ -209,3 +214,5 @@
     "registers must be different"
   );
 }
+
+#endif // SHARE_VM_ASM_REGISTER_HPP