diff --git a/invoice.xml b/invoice.xml
index 0b6175e8d8..0ae609a01c 100644
--- a/invoice.xml
+++ b/invoice.xml
@@ -186,7 +186,7 @@
                             <label name="currency"/>
                             <field name="currency"/>
                             <field name="lines" colspan="4">
-                                <tree string="Lines" sequence="sequence">
+                                <tree string="Lines" sequence="sequence" fill="1">
                                     <field name="type"/>
                                     <field name="product"/>
                                     <field name="account" tree_invisible="1"/>