'Tone' / 'noTone' fuctions

I'm trying the toneMelody example and I'm getting the following errors:

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

toneMelody.ino:36:42: error: 'tone' was not declared in this scope

toneMelody.ino:43:13: error: 'noTone' was not declared in this scope

Are the native tone / noTone functions not implemented?

Thanks!

-Mike