I have problems when compiling/verifying a code. The error is "'prog_uchar' does not name a type" when he's at

#include "mont.h"

long started =0;

int ticks = 0;

prog_uchar *pc;

// visualize voice (v) at amplitude (a) on an 8x8 grid

the detailed error is

Arduino: 1.6.5 (Mac OS X), Platine: "Arduino Uno"

In file included from singingPlant.ino:3:0:

/Users/benell/Documents/Arduino/libraries/Gameduino_midified_to_pin4/GD.h:51:39: error: 'prog_uchar' has not been declared

static void copy(unsigned int addr, prog_uchar *src, int count);

^

/Users/benell/Documents/Arduino/libraries/Gameduino_midified_to_pin4/GD.h:62:25: error: 'prog_uchar' has not been declared

static void microcode(prog_uchar *src, int count);

^

/Users/benell/Documents/Arduino/libraries/Gameduino_midified_to_pin4/GD.h:63:45: error: 'prog_uchar' has not been declared

static void uncompress(unsigned int addr, prog_uchar *src);

^

In file included from singingPlant.ino:5:0:

mont.h:1: error: 'prog_uchar' does not name a type

static PROGMEM prog_uchar mont[] = {

^

singingPlant:8: error: 'prog_uchar' does not name a type

singingPlant.ino: In function 'void setup()':

singingPlant:82: error: 'pc' was not declared in this scope

singingPlant:82: error: 'mont' was not declared in this scope

singingPlant.ino: In function 'void loop()':

singingPlant:143: error: 'pc' was not declared in this scope

singingPlant:143: error: 'mont' was not declared in this scope

In file included from /Applications/Arduino.app/Contents/Java/hardware/arduino/avr/cores/arduino/Arduino.h:28:0,

from /Applications/Arduino.app/Contents/Java/hardware/arduino/avr/libraries/SPI/SPI.h:17,

from singingPlant.ino:2:

singingPlant:157: error: 'pc' was not declared in this scope

singingPlant:170: error: 'pc' was not declared in this scope

singingPlant:173: error: 'pc' was not declared in this scope

singingPlant:178: error: 'pc' was not declared in this scope

'prog_uchar' does not name a type

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Do I have to modify the files somehow? Got the code over here: http://www.instructables.com/id/Singing-plant-Make-your-plant-sing-with-Arduino-/?ALLSTEPS