diff --git a/addons/purchase/purchase_view.xml b/addons/purchase/purchase_view.xml
index 6c522be9996..6d530f4a587 100644
--- a/addons/purchase/purchase_view.xml
+++ b/addons/purchase/purchase_view.xml
@@ -199,6 +199,7 @@
                 <form string="Purchase Order" version="7.0">
                 <header>
                     <button name="wkf_send_rfq" states="draft" string="Send RFQ by Mail" type="object" context="{'send_rfq':True}" class="oe_highlight"/>
+                    <button name="wkf_send_rfq" states="sent" string="Send RFQ by Mail" type="object" context="{'send_rfq':True}"/>
                     <button name="print_quotation" string="Print" type="object" states="draft" class="oe_highlight" groups="base.group_user"/>
                     <button name="print_quotation" string="Print" type="object" states="sent" groups="base.group_user"/>
                     <button name="purchase_confirm" states="draft" string="Confirm Order"/>