jslint error: Unexpected 'in'. Compare with undefined, or use the hasOwnProperty

I have the following javascript function that fails a jslint check

  function hasActiveX() {
    return ('ActiveXObject' in window);
  }

jslint error

Unexpected 'in'. Compare with undefined, or use the hasOwnProperty method instead.

should I just live with the jslint error, or is there a better way to determine ActiveXObject? I could not find a jslint flag to skip this check?