diff --git a/arg_fit.py b/arg_fit.py
index d4ce1fd..5b5c1a3 100644
--- a/arg_fit.py
+++ b/arg_fit.py
@@ -133,5 +133,5 @@ def main():
     print('tc_tcc:'+str(params[0])+'\ntc_tcfl:'+str(params[1])+'\ntc_tctl:'+str(params[2]))
 
 if __name__== "__main__" :
-    threshold＝250
+    threshold=250
     main()
\ No newline at end of file