diff --git a/src/Mmax.py b/src/Mmax.py
index 3b747b6..bbd8b36 100644
--- a/src/Mmax.py
+++ b/src/Mmax.py
@@ -207,7 +207,9 @@ def main(Input_catalog, Input_injection_rate, time_win_in_hours, time_step_in_ho
 
     if f_indx in [0,1,2,4]:
         if not b_method:
-            raise ValueError("Please chose an option for b-value")
+            raise ValueError("Please choose an option for b-value")
+        else:
+            Feat_dic['Param'][0]['b_method'] = b_method
 
     if f_indx in [0,4]:
         for cl_i in cl: