--- old/src/os/solaris/vm/interfaceSupport_solaris.hpp	2010-11-10 13:00:34.000000000 +0100
+++ new/src/os/solaris/vm/interfaceSupport_solaris.hpp	2010-11-10 13:00:34.000000000 +0100
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2005, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2005, 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
@@ -22,8 +22,13 @@
  *
  */
 
+#ifndef OS_SOLARIS_VM_INTERFACESUPPORT_SOLARIS_HPP
+#define OS_SOLARIS_VM_INTERFACESUPPORT_SOLARIS_HPP
+
 // Contains inlined functions for class InterfaceSupport
 
 static inline void serialize_memory(JavaThread *thread) {
   os::write_memory_serialize_page(thread);
 }
+
+#endif // OS_SOLARIS_VM_INTERFACESUPPORT_SOLARIS_HPP