How to prevent css class to apply on checkbox?

Let say I have following class into my general.css. this css has been applied on default.aspx.

In general.css there is class checkbox{ .... } on default.aspx I have one checkbox with

<input type='checkbox' />

so when page loads class checkbox applied on my checkbox. I want to prevent to apply checkbox class on this

checkbox. condition is I can't change general.css also I can't remove reference of general.css from default.aspx. only can do with input tag.