Near-horizon behavior of string-loop-corrected dyonic black holes

Dyonic black holes with corrections due to higher-genera world-sheet contributions are studied in the near-horizon region. In perturbative heterotic string theory compactified to four dimensions with N=2 supersymmetry, in the first order in string-loop expansion parameter, we solve the system of Maxwell and Killing spinor equations for dyonic black hole. At the horizon, string-loop-corrected solution displays restoration of spontaneously broken supersymmetry.