[boost] [bind] private member functions

Hi, Currently I have a class named Foo. Foo is using Boost.Bind to bind one of its own private methods to *this. However, since the method I'm binding is private, boost.bind cannot call it. Is there a way to make Boost.Bind a friend of my class? What is the recommended solution to such a problem? I did some quick searching on google about this issue but I came up with no results. Thanks.