conflicting with scala keyword

[mio-19]

327:321
an identifier expected, but 'macro' found
    def apply(point : CInt, end : CInt, mark : CInt, buflen : CInt, buffer : CString, ul : Ptr[UNDO_LIST], prompt : CString, rlstate : CInt, done : CInt, kmap : Keymap, lastfunc : Ptr[rl_command_func_t], insmode : CInt, edmode : CInt, kseq : CString, kseqlen : CInt, pendingin : CInt, inf : Ptr[FILE], outf : Ptr[FILE], macro : CString, catchsigs : CInt, catchsigwinch : CInt, entryfunc : Ptr[rl_compentry_func_t], menuentryfunc : Ptr[rl_compentry_func_t], ignorefunc : Ptr[rl_compignore_func_t], attemptfunc : Ptr[rl_completion_func_t], wordbreakchars : CString, reserved : CArray[CChar, Nat.Digit2[Nat._6, Nat._4]])(using Zone): Ptr[readline_state] =