Supplement to “Normal del Pezzo surfaces of rank one with log canonical singularities” by H. Kojima and T. Takahashi [J. Algebra 360 (2012) 53–70]

Kojima and Takahashi (2012) [5] proved that every normal del Pezzo surface of rank one with only rational log canonical singular points has at most five singular points. In this paper, we determine such surfaces with five singular points.