diff --git a/addons/hr_timesheet_invoice/hr_timesheet_invoice_view.xml b/addons/hr_timesheet_invoice/hr_timesheet_invoice_view.xml
index c45162ecbcb..64e0ef592b7 100644
--- a/addons/hr_timesheet_invoice/hr_timesheet_invoice_view.xml
+++ b/addons/hr_timesheet_invoice/hr_timesheet_invoice_view.xml
@@ -20,8 +20,8 @@
                 <xpath expr="/form/sheet" position='before'>
                     <header>
                         <button name="set_pending" string="Pending" type="object" states="open"/>
-                        <button name="set_close" string="Close" type="object" states="open,pending" class="oe_form_button_hi"/>
-                        <button name="set_open" string="Re-open Project" type="object" states="draft,cancelled,close,pending" class="oe_form_button_hi"/>
+                        <button name="set_close" string="Close" type="object" states="open,pending" class="oe_highlight"/>
+                        <button name="set_open" string="Re-open Project" type="object" states="draft,cancelled,close,pending" class="oe_highlight"/>
                         <button name="set_cancel" string="Cancel" type="object" states="open,pending"/>
                         <field name="state" readonly="1" widget="statusbar"
                             statusbar_visible="open,pending,close" statusbar_colors='{"pending":"red", "template":"blue"}'/>