diff --git a/commission_simple/views/commission_result.xml b/commission_simple/views/commission_result.xml
index 7928df2..f8f5952 100644
--- a/commission_simple/views/commission_result.xml
+++ b/commission_simple/views/commission_result.xml
@@ -36,7 +36,7 @@
                 </group>
             </group>
             <group name="lines" string="Commission Lines">
-                <field nolabel="1" name="line_ids" colspan="2">
+                <field nolabel="1" name="line_ids" colspan="2" widget="many2many">
                     <tree>
                         <field name="move_id"/>
                         <field name="date" optional="hide"/>