--- a/hotspot/src/os_cpu/solaris_x86/vm/thread_solaris_x86.hpp	Tue Nov 23 15:01:43 2010 -0500
+++ b/hotspot/src/os_cpu/solaris_x86/vm/thread_solaris_x86.hpp	Tue Nov 23 13:22:55 2010 -0800
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1999, 2007, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1999, 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 +22,9 @@
  *
  */
 
+#ifndef OS_CPU_SOLARIS_X86_VM_THREAD_SOLARIS_X86_HPP
+#define OS_CPU_SOLARIS_X86_VM_THREAD_SOLARIS_X86_HPP
+
  private:
   void pd_initialize()                           { _anchor.clear(); }
 
@@ -57,3 +60,5 @@
   static bool register_stack_overflow() { return false; }
   static void enable_register_stack_guard() {}
   static void disable_register_stack_guard() {}
+
+#endif // OS_CPU_SOLARIS_X86_VM_THREAD_SOLARIS_X86_HPP