[boost] [iostreams-1.33.0-RC1] documentation error?

2.1.1 states "Here io::stream<my_device> is a derived class of std::basic_streambuf, and io::stream<my_device> is a derived class of std::basic_istream, std::basic_ostream or std::basic_iostream depending on the mode of my_device, i.e., depending on which of the fundamental i/o operations read, write and seek it supports." Shouldn't the first part be "Here io::stream_buffer<my_device>"? Cheers Russell