[boost] boost/pool/pool.hpp why reinterpret_cast instead of static_cast?

Hi, In the file https://svn.boost.org/trac/boost/browser/trunk/boost/pool/pool.hpp there's the following code: struct default_user_allocator_malloc_free { ... static char * malloc(const size_type bytes) { return reinterpret_cast<char *>(std::malloc(bytes)); } ... }; It is my understanding that void* to T* convertions should be done using static_cast and not reinterpret_cast. Is there a reason for using reinterpret_cast there? Thanks, Philippe