diff --git a/addons/sale/wizard/sale_line_invoice.xml b/addons/sale/wizard/sale_line_invoice.xml
index a9ea13ea900..90bdf2a6828 100644
--- a/addons/sale/wizard/sale_line_invoice.xml
+++ b/addons/sale/wizard/sale_line_invoice.xml
@@ -11,7 +11,7 @@
     			<field name="grouped" />
              	<separator string="" colspan="6" />
               	<button special="cancel" string="Cancel" icon="gtk-cancel"/>
-               	<button name="makeInvoices" string="Create Invoices" type="object" icon="gtk-ok"/>
+               	<button name="make_invoices" string="Create Invoices" type="object" icon="gtk-ok"/>
              </form>
             </field>
 		</record>