diff --git a/addons/crm/crm_lead_view.xml b/addons/crm/crm_lead_view.xml
index e513a871e16..849cecaac85 100644
--- a/addons/crm/crm_lead_view.xml
+++ b/addons/crm/crm_lead_view.xml
@@ -380,7 +380,8 @@
                     <header>
                         <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"/>
+                        <button name="case_mark_lost" string="Mark Lost" type="object" class="oe_highlight"
+                                attrs="{'invisible': ['|', ('probability', '=', 0), ('probability', '=', 100)]}"/>
                         <field name="stage_id" widget="statusbar" clickable="True"
                                 domain="['&amp;', ('section_ids', '=', section_id), '|', ('type', '=', type), ('type', '=', 'both')]"/>
                     </header>