A22 not declared in this scope

Seems like it should be simple, but haven't seen anything in searches and I'm pretty new to Arduino and Teensy.

Desktop environment:
Teensy 3.6, Arduino 1.6.11/Teensyduino 1.31, Mac works fine on this line of code:

static int SIG_pin = A22;

I haven't updated my environment for a while, but needed to get one going on my laptop in front of a business trip.

Teensy 3.6, Arduino 1.8.4/Teensyduino 1.39, Macbook

Same line of code gives a compiler error of:

error: 'A22' not declared in this scope

Am I missing a Teensy lib or picking up an old one somehow? Or did the extended A port designations change in some way since 1.6.11/1.31?

Thanks for your help.

Can not see what the board type was set to? Make sure set to T3.6

Kurt, that was exactly right...it was defaulted to a 3.2. I'm so fixated on the 3.6 that didn't stop to think about the bigger world when setting up the new env. Thanks!