--- old/src/share/vm/memory/generationSpec.hpp	2010-11-10 13:14:13.000000000 +0100
+++ new/src/share/vm/memory/generationSpec.hpp	2010-11-10 13:14:13.000000000 +0100
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2001, 2004, 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 +22,12 @@
  *
  */
 
+#ifndef SHARE_VM_MEMORY_GENERATIONSPEC_HPP
+#define SHARE_VM_MEMORY_GENERATIONSPEC_HPP
+
+#include "memory/generation.hpp"
+#include "memory/permGen.hpp"
+
 // The specification of a generation.  This class also encapsulates
 // some generation-specific behavior.  This is done here rather than as a
 // virtual function of Generation because these methods are needed in
@@ -120,3 +126,5 @@
   size_t misc_code_size() const { return _misc_code_size; }
   bool enable_shared_spaces()    const { return _enable_shared_spaces; }
 };
+
+#endif // SHARE_VM_MEMORY_GENERATIONSPEC_HPP