Tactile Switch (4 pin) to SPST N.O (2 pin)?

Hi, I want to use an SPST N.O switch as a replacement for a tactile SPST, but the tactile one has 4 lugs, whereas the N.O one has only two. How can I wire this?

Tactile:

4 - 3

2 - 1

N.O:

1 - 2

Thanks very much.