diff --git a/addons/hr_expense/views/hr_expense_views.xml b/addons/hr_expense/views/hr_expense_views.xml
index 4b4ccd49fc8..18a5945850b 100644
--- a/addons/hr_expense/views/hr_expense_views.xml
+++ b/addons/hr_expense/views/hr_expense_views.xml
@@ -150,7 +150,7 @@
                             <label for="quantity" attrs="{'invisible': [('product_has_cost', '=', False)]}"/>
                             <div class="o_row" attrs="{'invisible': [('product_has_cost', '=', False)]}">
                                 <field name="quantity" class="oe_inline" attrs="{'readonly': [('sheet_is_editable', '=', False)]}" style="width: auto !important;"/>
-                                <field name="product_uom_id" required="1" options="{'no_open': True, 'no_create': True}" class="oe_inline" groups="uom.group_uom"/>
+                                <field name="product_uom_id" required="1" force_save="1" options="{'no_open': True, 'no_create': True}" class="oe_inline" groups="uom.group_uom"/>
                             </div>
 
                             <label for="total_amount" string="Total" attrs="{'invisible': [('product_has_cost', '=', True)]}"/>