--- old/src/cpu/x86/vm/registerMap_x86.hpp	2010-11-16 18:03:23.000000000 +0100
+++ new/src/cpu/x86/vm/registerMap_x86.hpp	2010-11-16 18:03:23.000000000 +0100
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1998, 2007, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1998, 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_REGISTERMAP_X86_HPP
+#define CPU_X86_VM_REGISTERMAP_X86_HPP
+
 // machine-dependent implemention for register maps
   friend class frame;
 
@@ -37,3 +40,5 @@
   void pd_clear() {}
   void pd_initialize() {}
   void pd_initialize_from(const RegisterMap* map) {}
+
+#endif // CPU_X86_VM_REGISTERMAP_X86_HPP