def fix_alpha(with_alpha, without_alpha):
    """
    Given two of the same image, one with an alpha channel and one without, add the alpha
    channel back into the image without, and return it.

    :param with_alpha:
    :param without_alpha:
    :return:
    """
    alpha_added = with_alpha.copy()
    alpha_added[:, :, :3] = without_alpha
    return alpha_added