diff --git a/generate-files-for-simplestream.py b/generate-files-for-simplestream.py
index debe3d7e7390acb7d6ae0df1a8a1c6dbc499fa6f..7c2ab58073b6c870f69eced07a5dddfe565a149b 100755
--- a/generate-files-for-simplestream.py
+++ b/generate-files-for-simplestream.py
@@ -10,7 +10,7 @@ import argparse
 
 
 parser = argparse.ArgumentParser(description='Generate simplestreams metadata')
-parser.add_argument('-r','--regions', nargs='+', help='List of regions: e.g. garr-ct1 garr-pa1. default=[\'garr-ct1, garr-pa1\']', default=['garr-ct1, garr-pa1'], required=False)
+parser.add_argument('-r','--regions', nargs='+', help='List of regions: e.g. garr-ct1 garr-pa1 garr-na. default=[\'garr-ct1, garr-pa1, garr-na\']', default=['garr-ct1, garr-pa1, garr-na'], required=False)
 parser.add_argument('-k','--keystone', help='Keystone endpoint: e.g. https://keystone.cloud.garr.it:5000/v3. default="https://keystone.cloud.garr.it:5000/v3"', default="https://keystone.cloud.garr.it:5000/v3", required=False)