The PyBuffer_FillInfo() function definition in the latest revision of Cython/Includes/cpython/buffer.pxd appears to be missing a parameter. Shouldn't it be something like the following? int PyBuffer_FillInfo(Py_buffer *view, object obj, void *buf, Py_ssize_t len, int readonly, int flags) except -1 -- Lev Givon http://www.columbia.edu/~lev/ http://lebedov.github.com/