diff --git a/view/purchase_form.xml b/view/purchase_form.xml
index 6b779a22ce..dade990d8d 100644
--- a/view/purchase_form.xml
+++ b/view/purchase_form.xml
@@ -39,7 +39,7 @@ this repository contains the full copyright notices and license terms. -->
                 <field name="tax_amount" xalign="1.0" xexpand="0"/>
                 <label name="total_amount" xalign="1.0" xexpand="1"/>
                 <field name="total_amount" xalign="1.0" xexpand="0"/>
-                <group col="6" colspan="2" id="buttons">
+                <group col="-1" colspan="2" id="buttons">
                     <button name="cancel" string="Cancel"
                         icon="tryton-cancel"/>
                     <button name="draft" string="Draft"/>