def _uuid_set_high_bit(pvm_uuid):
    """Turns on the high bit of a uuid

    PowerVM uuids always set the byte 0, bit 0 to 0.
    So to convert it to an OpenStack uuid we may have to set the high bit.

    :param uuid: A PowerVM compliant uuid
    :returns: A standard format uuid string
    """
    return '%x%s' % (int(pvm_uuid[0], 16) | 8, pvm_uuid[1:])
