diff --git a/addons/purchase/views/purchase_views.xml b/addons/purchase/views/purchase_views.xml
index eaaec54f341..ac69a1054fb 100644
--- a/addons/purchase/views/purchase_views.xml
+++ b/addons/purchase/views/purchase_views.xml
@@ -210,7 +210,7 @@
                                     <field name="currency_id" invisible="1"/>
                                     <field name="state" invisible="1"/>
                                     <field name="sequence" widget="handle"/>
-                                    <field name="product_id" attrs="{'readonly': [('state', 'in', ('purchase', 'to approve','done', 'cancel'))]}" context="{'partner_id':parent.partner_id, 'quantity':product_qty,'uom':product_uom, 'company_id': parent.company_id}"/>
+                                    <field name="product_id" attrs="{'readonly': [('state', 'in', ('purchase', 'to approve','done', 'cancel'))]}" context="{'partner_id':parent.partner_id, 'quantity':product_qty,'uom':product_uom, 'company_id': parent.company_id}" force_save="1"/>
                                     <field name="name"/>
                                     <field name="date_planned"/>
                                     <field name="company_id" groups="base.group_multi_company" options="{'no_create': True}"/>
@@ -219,7 +219,7 @@
                                     <field name="product_qty"/>
                                     <field name="qty_received" invisible="not context.get('show_purchase', True)"/>
                                     <field name="qty_invoiced" invisible="not context.get('show_purchase', True)"/>
-                                    <field name="product_uom" groups="product.group_uom" attrs="{'readonly': [('state', 'in', ('purchase', 'done', 'cancel'))]}"/>
+                                    <field name="product_uom" groups="product.group_uom" attrs="{'readonly': [('state', 'in', ('purchase', 'done', 'cancel'))]}" force_save="1"/>
                                     <field name="price_unit"/>
                                     <field name="taxes_id" widget="many2many_tags" domain="[('type_tax_use','=','purchase')]" context="{'default_type_tax_use': 'purchase'}" options="{'no_create': True}"/>
                                     <field name="price_subtotal" widget="monetary"/>