Car driving backwards with triggers

In the Input manager, I made a “Triggers” input that works with my PS4 controller with the 5th axis. The only problem is that when no trigger is pressed, it does not return to 0. It returns to -1 which makes the car drive backwards.
This is what happens:
R2 = 1
L2 = -1
Nothing Pressed = -1

How can I get “Nothing pressed” to return to 0?

Since you don’t show code, how about

If(NothingPressed == -1)
NothingPressed = 0;