diff --git a/storage_s3/indico_storage_s3/plugin.py b/storage_s3/indico_storage_s3/plugin.py
index f7b0526..84c85cc 100644
--- a/storage_s3/indico_storage_s3/plugin.py
+++ b/storage_s3/indico_storage_s3/plugin.py
@@ -112,7 +112,7 @@ class S3StoragePlugin(IndicoPlugin):
                     storage_instance._create_bucket(bucket_name)
                     click.echo('Storage {}: bucket {} created'.format(key, bucket_name))
                 elif storage:
-                    click.echo('Storage {} is not a s3 storage'.format(key))
+                    click.echo('Storage {} is not an s3 storage'.format(key))
                     sys.exit(1)
 
         return create_s3_bucket