--- old/src/share/vm/memory/heap.hpp	2010-11-10 13:14:15.000000000 +0100
+++ new/src/share/vm/memory/heap.hpp	2010-11-10 13:14:14.000000000 +0100
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2006, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 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_HEAP_HPP
+#define SHARE_VM_MEMORY_HEAP_HPP
+
+#include "memory/allocation.hpp"
+#include "runtime/virtualspace.hpp"
+
 // Blocks
 
 class HeapBlock VALUE_OBJ_CLASS_SPEC {
@@ -159,3 +165,5 @@
   void verify();
   void print()  PRODUCT_RETURN;
 };
+
+#endif // SHARE_VM_MEMORY_HEAP_HPP