diff --git a/user_libs/optimisation_taguchi/plot_results.py b/user_libs/optimisation_taguchi/plot_results.py
index 6fbefd8b..72c87062 100644
--- a/user_libs/optimisation_taguchi/plot_results.py
+++ b/user_libs/optimisation_taguchi/plot_results.py
@@ -5,7 +5,7 @@
 #
 # Please use the attribution at http://dx.doi.org/10.1190/1.3548506
 
-import argparse,
+import argparse
 import os
 import pickle