MVC if checkbox is checked return true to controller and if it isn't, return false

Currently I have a checkbox that looks like this

 Adjust inventory levels <input type="checkbox" name="invChkBox" id="invChkBox" value="true" />

And my post controller method has parameters that look like this

 public ActionResult EditItemInstance(int ID, string serialNumber, int ItemID, bool invChkBox)

but when the chkBox isn't checked it returns an error page. That has an error message saying

null entry for parameter 'invChkBox' of non-nullable type 'System.Boolean'

How can I edit my code so that it returns false if the checkbox is not clicked?