Rounded corners on table cells

I'm pretty sure the answer to this is 'no' but I'll ask it nevertheless.

I'm designing a form in InDesign (the kind of thing you might get from a bank, a big light grey box, with white spaces to indicate areas that need to be filled out). I want to make the white spaces have slightly rounded corners, but ideally I'd like to build this as a table.

Is there a (hacky) way to give the cells of an InDesign table rounded corners?