diff --git a/purchase.xml b/purchase.xml
index 7b25616b35..f1f110e2bf 100644
--- a/purchase.xml
+++ b/purchase.xml
@@ -89,7 +89,7 @@ this repository contains the full copyright notices and license terms. -->
                                 <field name="state"/>
                                 <group col="6" colspan="2" id="buttons">
                                     <button name="cancel" string="Cancel"
-                                        states="{'invisible': '''not ((state in ('draft', 'quotation')) or (invoice_state == 'exception') or (shipment_state == 'exception')) ''', 'readonly': '''%(group_purchase)d not in groups'''}"
+                                        states="{'invisible': '''state == 'cancel' or not ((state in ('draft', 'quotation')) or ((invoice_state == 'exception') and (shipment_state == 'exception'))) ''', 'readonly': '''%(group_purchase)d not in groups'''}"
                                         icon="tryton-cancel"/>
                                     <button name="draft" string="Draft"
                                         states="{'invisible': '''state != 'quotation' ''', 'readonly': '''%(group_purchase)d not in groups'''}"