Use an existing type definition in a zod definition?

Question

in lib.dom.ts there is a type definition:

type RTCSdpType = "answer" | "offer" | "pranswer" | "rollback";

I want to create a type definition with zod, where the type references the RTCSdpType definition. Is this possible to do?

const MyType = z.object({
    t: RTCSdpType, // <--- ERROR: 'RTCSdpType' only refers to a type, but is being used as a value here.
})