Hi, What do you think about adding move support for at_thread_exit? template<typename F> void at_thread_exit(F&& f); and be emulated with the following prototypes? template<typename F> void at_thread_exit(detail::thread_move_t<F> f); template<typename F> void at_thread_exit(F f, typename disable_if<boost::is_convertible<F&,detail::thread_move_t<F> >, dummy* >::type=0); BTW, could you tell us why this function is not included on the C++0x proposal? Best, Vicente