--- old/src/share/vm/classfile/placeholders.hpp	2010-11-16 18:09:34.000000000 +0100
+++ new/src/share/vm/classfile/placeholders.hpp	2010-11-16 18:09:34.000000000 +0100
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2003, 2007, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2003, 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 +22,11 @@
  *
  */
 
+#ifndef SHARE_VM_CLASSFILE_PLACEHOLDERS_HPP
+#define SHARE_VM_CLASSFILE_PLACEHOLDERS_HPP
+
+#include "utilities/hashtable.hpp"
+
 class PlaceholderEntry;
 
 // Placeholder objects. These represent classes currently
@@ -329,3 +334,5 @@
   void print() const  PRODUCT_RETURN;
   void verify() const;
 };
+
+#endif // SHARE_VM_CLASSFILE_PLACEHOLDERS_HPP