--- old/src/cpu/zero/vm/assembler_zero.hpp	2010-11-16 18:03:50.000000000 +0100
+++ new/src/cpu/zero/vm/assembler_zero.hpp	2010-11-16 18:03:50.000000000 +0100
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2007, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved.
  * Copyright 2007, 2008, 2009 Red Hat, Inc.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
@@ -23,6 +23,9 @@
  *
  */
 
+#ifndef CPU_ZERO_VM_ASSEMBLER_ZERO_HPP
+#define CPU_ZERO_VM_ASSEMBLER_ZERO_HPP
+
 // In normal, CPU-specific ports of HotSpot these two classes are used
 // for generating assembly language.  We don't do any of this in zero,
 // of course, but we do sneak entry points around in CodeBuffers so we
@@ -62,3 +65,5 @@
 
 address ShouldNotCallThisStub();
 address ShouldNotCallThisEntry();
+
+#endif // CPU_ZERO_VM_ASSEMBLER_ZERO_HPP