diff --git a/openerp/addons/base/ir/ir.xml b/openerp/addons/base/ir/ir.xml
index 6f5ed44749e..6a845b35602 100644
--- a/openerp/addons/base/ir/ir.xml
+++ b/openerp/addons/base/ir/ir.xml
@@ -1131,7 +1131,6 @@
                                 <field name="selection" attrs="{'required': [('ttype','in',['selection','reference'])], 'readonly': [('ttype','not in',['selection','reference'])]}"/>
                                 <field name="size" attrs="{'required': [('ttype','in',['char','reference'])], 'readonly': [('ttype','not in',['char','reference'])]}"/>
                                 <field name="domain" attrs="{'readonly': [('relation','=','')]}"/>
-                                <field name="model_id" invisible="1"/>
                                 <field name="serialization_field_id" attrs="{'readonly': [('state','=','base')]}" domain = "[('ttype','=','serialized'), ('model_id', '=', model_id)]"/>
                             </group>