diff --git a/post_process/animate/__main__.py b/post_process/animate/__main__.py
index 12695ba..852785d 100644
--- a/post_process/animate/__main__.py
+++ b/post_process/animate/__main__.py
@@ -6,11 +6,10 @@ parser = argparse.ArgumentParser(
 parser.add_argument('var', type=str,
     help='OpenFoam variable to display')
 parser.add_argument('-c', '--config', type=str,
-    help='Configuration file')
+    default='config.ini',
+    help='Configuration file (default config.ini)')
 
 args = parser.parse_args()
-if args.config == None:
-    args.config = 'config.ini'
 
 if args.var == 'alpha.water':
     import alpha_water