Arduino ISP sketch not compiling

I am trying to follow various methods of using the arduino uno as a programmer and loading a bootloader into an attiny 45.

I have got as far as loading the ArduinoISP sketch into the uno and compiling it.

(are there different ArduinoISP sketches? this one is written by Randall Bohn)

When I compile it it fails with ‘Serial’ was not declared in this scope any body know what I am doing wrong?

found it. My tools/board was set to attiny, I assume there is no Serial in the attiny software.