diff --git a/report_wkhtmltopdf_param/README.rst b/report_wkhtmltopdf_param/README.rst
index 98e5ae8e9..a72a5c967 100644
--- a/report_wkhtmltopdf_param/README.rst
+++ b/report_wkhtmltopdf_param/README.rst
@@ -23,7 +23,7 @@ Usage
#. Go to *Settings* and press 'Activate the developer mode (with assets)'
#. Go to *Settings - Technical - Reports - Paper Format*
#. Add additional parameters indicating the command argument name (remember to
- add prefix -- or -) and value.
+ add prefix -- or -) and value.
.. image:: https://odoo-community.org/website/image/ir.attachment/5784_f2813bd/datas
:alt: Try me on Runbot