diff --git a/addons/crm/crm_lead_view.xml b/addons/crm/crm_lead_view.xml
index 20097b2adee..fba44af114c 100644
--- a/addons/crm/crm_lead_view.xml
+++ b/addons/crm/crm_lead_view.xml
@@ -376,7 +376,7 @@
                         <button name="case_mark_won" string="Mark Won" type="object" class="oe_highlight"
                                 attrs="{'invisible': [('probability', '=', 100)]}"/>
                         <button name="case_mark_lost" string="Mark Lost" type="object" class="oe_highlight"
-                                attrs="{'invisible': [('probability', '=', 0)]}"/>
+                                attrs="{'invisible': [('probability', 'in', [0,100])]}"/>
                         <field name="stage_id" widget="statusbar" clickable="True"
                                 domain="['&amp;', ('section_ids', '=', section_id), '|', ('type', '=', type), ('type', '=', 'both')]"/>
                     </header>