diff --git a/src/seismic_hazard_forecasting.py b/src/seismic_hazard_forecasting.py
index a5c43ac..6fc5d73 100644
--- a/src/seismic_hazard_forecasting.py
+++ b/src/seismic_hazard_forecasting.py
@@ -81,6 +81,7 @@ def main(catalog_file, mc_file, pdf_file, m_file, m_select, mag_label, mc, m_max
         m_range = [None]
     else:
         m_range = read_mat_m(m_file)
+        m_max = m_range[-1] # take m_max from the m_file
 
     if verbose:
         logger.setLevel(logging.DEBUG)