Second touch counts as mouse press - bug?

This code fires when using a touch screen and a second finger is pressed:

                if(Input.GetMouseButton(1)){
                    print("mouse 1");
                }

Is this just a bug, or is there a setting I can adjust? This is Unity 5.6.1.

You probably have Input.simulateMouseWithTouches set to true, then mouse events are generated for touches, where two finger count as right-click.

That’s fixed it. Thanks!