Typescript: Can't return child class instance from super class' function

Question

I'm having trouble returning a child class object from a super class function. I have the following structure:

pizza.ts:

import { PineapplePizza } from './pineapple.pizza';

export class Pizza {
    public putOn(Pineapple pineapple): Pizza {
        // ...
        return new PineapplePizza(pineapple);
        // ...
    }
}

pineapple.pizza.ts:

import { Pizza } from './pizza';

export class PineapplePizza extends Pizza {
    // ...
}

But I keep getting this runtime error:

firefox:

ReferenceError: can't access lexical declaration 'Pizza' before initialization

chrome:

ReferenceError: 'Pizza' is not defined

Does anyone know how to fix that? Or is impossible to return a child class instance from a super class?

EDIT #1:

This might be due to circular importing. Is there a way to pre-declare a class, kind of like with c++? Or a way to control which file gets compiled first?