diff --git a/sale.xml b/sale.xml
index 3ab33c3..ee328ba 100644
--- a/sale.xml
+++ b/sale.xml
@@ -14,12 +14,9 @@ copyright notices and license terms. -->
         <record model="ir.action.act_window" id="act_payment_form">
             <field name="name">Payments</field>
             <field name="res_model">account.statement.line</field>
-            <field name="domain"
-                eval="[('sale', 'in', Eval('active_ids'))]"
-                pyson="1"/>
+            <field name="domain" eval="[If(Eval('active_ids', []) == [Eval('active_id')], ('sale', '=', Eval('active_id')), ('sale', 'in', Eval('active_ids')))]" pyson="1"/>
         </record>
-        <record model="ir.action.keyword"
-                id="act_open_payment_keyword1">
+        <record model="ir.action.keyword" id="act_open_payment_keyword1">
             <field name="keyword">form_relate</field>
             <field name="model">sale.sale,-1</field>
             <field name="action" ref="act_payment_form"/>