Index: include/ext/concurrence.h
===================================================================
--- include/ext/concurrence.h	(revision 163836)
+++ include/ext/concurrence.h	(working copy)
@@ -1,6 +1,6 @@
 // Support for concurrent programing -*- C++ -*-
 
-// Copyright (C) 2003, 2004, 2005, 2006, 2007, 2009
+// Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
 // Free Software Foundation, Inc.
 //
 // This file is part of the GNU ISO C++ Library.  This library is free
@@ -31,6 +31,8 @@
 #ifndef _CONCURRENCE_H
 #define _CONCURRENCE_H 1
 
+#pragma GCC system_header
+
 #include <exception>
 #include <bits/gthr.h> 
 #include <bits/functexcept.h>