--- old/src/os_cpu/windows_x86/vm/unwind_windows_x86.hpp	2010-10-28 13:51:12.000000000 +0200
+++ new/src/os_cpu/windows_x86/vm/unwind_windows_x86.hpp	2010-10-28 13:51:12.000000000 +0200
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2004, 2009, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2004, 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 OS_CPU_WINDOWS_X86_VM_UNWIND_WINDOWS_X86_HPP
+#define OS_CPU_WINDOWS_X86_VM_UNWIND_WINDOWS_X86_HPP
+
 
 #ifdef AMD64
 typedef unsigned char UBYTE;
@@ -81,3 +84,5 @@
 #endif
 
 #endif // AMD64
+
+#endif // OS_CPU_WINDOWS_X86_VM_UNWIND_WINDOWS_X86_HPP