diff --git a/addons/sale/i18n/sale.pot b/addons/sale/i18n/sale.pot
index d5bd71d36ee..7b736619c08 100644
--- a/addons/sale/i18n/sale.pot
+++ b/addons/sale/i18n/sale.pot
@@ -5022,6 +5022,13 @@ msgstr ""
 msgid "You cannot cancel a locked order. Please unlock it first."
 msgstr ""
 
+#. module: sale
+#. odoo-python
+#: code:addons/sale/models/sale_order.py:0
+#, python-format
+msgid "You cannot change the pricelist of a confirmed order !"
+msgstr ""
+
 #. module: sale
 #. odoo-python
 #: code:addons/sale/models/product_product.py:0
diff --git a/addons/sale/models/sale_order.py b/addons/sale/models/sale_order.py
index 54007845b14..bcdfcaa1fb5 100644
--- a/addons/sale/models/sale_order.py
+++ b/addons/sale/models/sale_order.py
@@ -786,6 +786,11 @@ class SaleOrder(models.Model):
             ]
         return super().copy_data(default)
 
+    def write(self, values):
+        if 'pricelist_id' in values and any(so.state == 'sale' for so in self):
+            raise UserError(_("You cannot change the pricelist of a confirmed order !"))
+        return super().write(values)
+
     @api.ondelete(at_uninstall=False)
     def _unlink_except_draft_or_cancel(self):
         for order in self: