diff --git a/addons/sale/models/sale_order.py b/addons/sale/models/sale_order.py
index 7dd1280dae7..ddcede255c6 100644
--- a/addons/sale/models/sale_order.py
+++ b/addons/sale/models/sale_order.py
@@ -779,7 +779,16 @@ class SaleOrder(models.Model):
 
         :return: `mail.template` record or None if default template wasn't found
         """
-        return self.env.ref('sale.mail_template_sale_confirmation', raise_if_not_found=False)
+        self.ensure_one()
+        default_confirmation_template_id = self.env['ir.config_parameter'].sudo().get_param(
+            'sale.default_confirmation_template'
+        )
+        default_confirmation_template = default_confirmation_template_id \
+            and self.env['mail.template'].browse(int(default_confirmation_template_id)).exists()
+        if default_confirmation_template:
+            return default_confirmation_template
+        else:
+            return self.env.ref('sale.mail_template_sale_confirmation', raise_if_not_found=False)
 
     def action_quotation_sent(self):
         """ Mark the given draft quotation(s) as sent.