MPU6050_6Axis_MotionApps20.h Error

[TheRobotBuilder]

Hi, I am using a version of the MPU6050_6Axis_MotionApps20.h that I got from here( http://www.sainsmart.com/sainsmart-balancing-robot-kit.html) for a robot. However when I compile I get this error 

in file included from balancing_robot.ino:9:0:
/Users/richard/Documents/Arduino/libraries/Robot/MPU6050_6Axis_MotionApps20.h:89:7: error: 'prog_uchar' does not name a type
 const prog_uchar dmpMemory[MPU6050_DMP_CODE_SIZE] PROGMEM = {

Any help would be greatly appreciated 

Thanks