diff --git a/localization_log_gamma_model.py b/localization_log_gamma_model.py
index 0306d0c..e16ce51 100644
--- a/localization_log_gamma_model.py
+++ b/localization_log_gamma_model.py
@@ -87,7 +87,7 @@ def fittingSingle(filepath, args):
           .format(stat['5perc'], stat['95perc'], stat['median'], stat['mean']))
 
     if args.outputfile:
-        filename = os.path.basename(args.outputfile)
+        filename = os.path.basename(filepath)
         with open(args.outputfile, 'a') as f:
             f.write(
                 "{},".format(filename) +