--- old/src/cpu/x86/vm/vmreg_x86.hpp	2010-11-16 18:03:46.000000000 +0100
+++ new/src/cpu/x86/vm/vmreg_x86.hpp	2010-11-16 18:03:46.000000000 +0100
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2006, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2006, 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 +22,9 @@
  *
  */
 
+#ifndef CPU_X86_VM_VMREG_X86_HPP
+#define CPU_X86_VM_VMREG_X86_HPP
+
   bool is_Register();
   Register as_Register();
 
@@ -30,3 +33,5 @@
 
   bool is_XMMRegister();
   XMMRegister as_XMMRegister();
+
+#endif // CPU_X86_VM_VMREG_X86_HPP