--- old/src/share/vm/utilities/numberSeq.hpp	2010-10-28 14:04:00.000000000 +0200
+++ new/src/share/vm/utilities/numberSeq.hpp	2010-10-28 14:04:00.000000000 +0200
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2001, 2007, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2001, 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 SHARE_VM_UTILITIES_NUMBERSEQ_HPP
+#define SHARE_VM_UTILITIES_NUMBERSEQ_HPP
+
 /**
  **  This file contains a few classes that represent number sequence,
  **  x1, x2, x3, ..., xN, and can calculate their avg, max, and sd.
@@ -125,3 +128,5 @@
   // Debugging/Printing
   virtual void dump_on(outputStream* s);
 };
+
+#endif // SHARE_VM_UTILITIES_NUMBERSEQ_HPP