The palatal rotational flap is a reliable and predictable flap. The pedicled nature of the flap ensures reliable vascular supply. It however leaves a bare donor site which usually heals via secondary intention. However, there is an increased risk of donor site morbidity when applied in a compromised host. The authors report a rare case of an osteoradionecrosis at the donor site following the application of the palatal rotational flap. Caution should be exercised when applying this flap in a compromised tissue.