diff --git a/addons/mrp/mrp_view.xml b/addons/mrp/mrp_view.xml
index 4ad61ba02be..bf846bf2f47 100644
--- a/addons/mrp/mrp_view.xml
+++ b/addons/mrp/mrp_view.xml
@@ -225,7 +225,7 @@
                     <field name="product_uos_qty" groups="product.group_uos"/>
                     <field name="routing_id" select="2"/>
                     <field name="type"/>
-                    <notebook>
+                    <notebook colspan="4">
                         <page string="General Information">
                             <field colspan="4" name="bom_lines" nolabel="1" widget="one2many_list"/>
                         </page>