diff --git a/addons/crm/crm_opportunity_view.xml b/addons/crm/crm_opportunity_view.xml
index c712064b170..0be6e34e1a6 100644
--- a/addons/crm/crm_opportunity_view.xml
+++ b/addons/crm/crm_opportunity_view.xml
@@ -248,9 +248,6 @@
                         <button name="case_pending" string="Pending"
                             states="open,draft" type="object"
                             icon="gtk-media-pause" />
-                        <button name="case_mark_lost" string="Lost"
-                            states="open,pending" type="object"
-                            icon="gtk-cancel" />
                         <button name="case_close" string="Won"
                             states="open,draft,pending" type="object"
                             icon="gtk-apply" />