Compile error for ESP8266

arduino/libraries/madleech-Auto485-3ff0421/Auto485.cpp: In member function 'void Auto485::begin(long unsigned int, uint8_t)':
arduino/libraries/madleech-Auto485-3ff0421/Auto485.cpp:58:28: error: invalid conversion from 'uint8_t {aka unsigned char}' to 'SerialConfig' [-fpermissive]
  _serial.begin(baud, config);

                            ^