diff --git a/openerp/addons/base/base.sql b/openerp/addons/base/base.sql
index 2547a7309e1..7084148885b 100644
--- a/openerp/addons/base/base.sql
+++ b/openerp/addons/base/base.sql
@@ -19,6 +19,7 @@ CREATE TABLE ir_model (
   name varchar,
   state varchar,
   info text,
+  transient boolean,
   primary key(id)
 );
 
diff --git a/openerp/addons/base/ir/ir_model.py b/openerp/addons/base/ir/ir_model.py
index 8c6517b98f2..8ad487d7c11 100644
--- a/openerp/addons/base/ir/ir_model.py
+++ b/openerp/addons/base/ir/ir_model.py
@@ -57,27 +57,6 @@ class ir_model(osv.osv):
     _description = "Models"
     _order = 'model'
 
-    def _is_osv_memory(self, cr, uid, ids, field_name, arg, context=None):
-        models = self.browse(cr, uid, ids, context=context)
-        res = dict.fromkeys(ids)
-        for model in models:
-            if model.model in self.pool:
-                res[model.id] = self.pool[model.model].is_transient()
-            else:
-                _logger.error('Missing model %s' % (model.model, ))
-        return res
-
-    def _search_osv_memory(self, cr, uid, model, name, domain, context=None):
-        if not domain:
-            return []
-        __, operator, value = domain[0]
-        if operator not in ['=', '!=']:
-            raise UserError(_("Invalid Search Criteria") + ": " + _("The osv_memory field can only be compared with = and != operator."))
-        value = bool(value) if operator == '=' else not bool(value)
-        all_model_ids = self.search(cr, uid, [], context=context)
-        is_osv_mem = self._is_osv_memory(cr, uid, all_model_ids, 'osv_memory', arg=None, context=context)
-        return [('id', 'in', [id for id in is_osv_mem if bool(is_osv_mem[id]) == value])]
-
     def _view_ids(self, cr, uid, ids, field_name, arg, context=None):
         models = self.browse(cr, uid, ids)
         res = {}
@@ -103,9 +82,7 @@ class ir_model(osv.osv):
             help="The list of models that extends the current model."),
         'state': fields.selection([('manual','Custom Object'),('base','Base Object')],'Type', readonly=True),
         'access_ids': fields.one2many('ir.model.access', 'model_id', 'Access'),
-        'osv_memory': fields.function(_is_osv_memory, string='Transient Model', type='boolean',
-            fnct_search=_search_osv_memory,
-            help="This field specifies whether the model is transient or not (i.e. if records are automatically deleted from the database or not)"),
+        'transient': fields.boolean(string="Transient Model"),
         'modules': fields.function(_in_modules, type='char', string='In Modules', help='List of modules in which the object is defined or inherited'),
         'view_ids': fields.function(_view_ids, type='one2many', obj='ir.ui.view', string='Views'),
     }
@@ -195,7 +172,7 @@ class ir_model(osv.osv):
         res = super(ir_model,self).create(cr, user, vals, context)
         if vals.get('state','base')=='manual':
             # add model in registry
-            self.instanciate(cr, user, vals['model'], context)
+            self.instanciate(cr, user, vals['model'], vals.get('transient', False), context)
             self.pool.setup_models(cr, partial=(not self.pool.ready))
             # update database schema
             model = self.pool[vals['model']]
@@ -209,7 +186,7 @@ class ir_model(osv.osv):
             RegistryManager.signal_registry_change(cr.dbname)
         return res
 
-    def instanciate(self, cr, user, model, context=None):
+    def instanciate(self, cr, user, model, transient, context=None):
         if isinstance(model, unicode):
             model = model.encode('utf-8')
 
@@ -217,6 +194,7 @@ class ir_model(osv.osv):
             _name = model
             _module = False
             _custom = True
+            _transient = bool(transient)
 
         CustomModel._build_model(self.pool, cr)
 
diff --git a/openerp/addons/base/ir/ir_model_view.xml b/openerp/addons/base/ir/ir_model_view.xml
index bdd5868ce03..f26cc426a7f 100644
--- a/openerp/addons/base/ir/ir_model_view.xml
+++ b/openerp/addons/base/ir/ir_model_view.xml
@@ -32,7 +32,7 @@
                         <group>
                             <field name="name"/>
                             <field name="model"/>
-                            <field name="osv_memory"/>
+                            <field name="transient"/>
                         </group>
                         <group>
                             <field name="state"/>
@@ -116,7 +116,7 @@
                     <field name="model"/>
                     <field name="name"/>
                     <field name="state"/>
-                    <field name="osv_memory"/>
+                    <field name="transient"/>
                 </tree>
             </field>
         </record>
@@ -126,8 +126,8 @@
                 <search string="Model Description">
                     <field name="name" filter_domain="['|', ('name','ilike',self), ('model','ilike',self)]" string="Model"/>
                     <filter icon="terp-camera_test"
-                        string="In Memory"
-                        domain="[('osv_memory', '=', True)]"/>
+                        string="Transient"
+                        domain="[('transient', '=', True)]"/>
                     <separator/>
                     <filter icon="terp-stock_align_left_24"
                         string="Custom"
diff --git a/openerp/addons/base/ir/report_ir_model.xml b/openerp/addons/base/ir/report_ir_model.xml
index 6d273bbe082..4dd59242d42 100644
--- a/openerp/addons/base/ir/report_ir_model.xml
+++ b/openerp/addons/base/ir/report_ir_model.xml
@@ -13,8 +13,8 @@
                         </td>
                         <td colspan="8">
                             <p>Type: <span t-field="o.state"/></p>
-                            <p t-if="o.osv_memory">In-memory: True</p>
-                            <p t-if="not o.osv_memory">In-memory: False</p>
+                            <p t-if="o.transient">Transient: True</p>
+                            <p t-if="not o.transient">Transient: False</p>
                             <p>Modules: <span t-field="o.modules"/></p>
                         </td>
                     </tr>
diff --git a/openerp/models.py b/openerp/models.py
index 8326130ab43..8cfff7c7777 100644
--- a/openerp/models.py
+++ b/openerp/models.py
@@ -353,7 +353,8 @@ class BaseModel(object):
         if not cr.rowcount:
             cr.execute('SELECT nextval(%s)', ('ir_model_id_seq',))
             model_id = cr.fetchone()[0]
-            cr.execute("INSERT INTO ir_model (id,model, name, info,state) VALUES (%s, %s, %s, %s, %s)", (model_id, self._name, self._description, self.__doc__, 'base'))
+            cr.execute("INSERT INTO ir_model (id, model, name, info, state, transient) VALUES (%s, %s, %s, %s, %s, %s)",
+                       (model_id, self._name, self._description, self.__doc__, 'base', self._transient))
         else:
             model_id = cr.fetchone()[0]
         if 'module' in context:
diff --git a/openerp/modules/registry.py b/openerp/modules/registry.py
index d25bd147501..e7af183c4fc 100644
--- a/openerp/modules/registry.py
+++ b/openerp/modules/registry.py
@@ -159,9 +159,9 @@ class Registry(Mapping):
 
         # load custom models
         ir_model = self['ir.model']
-        cr.execute('select model from ir_model where state=%s', ('manual',))
-        for (model_name,) in cr.fetchall():
-            ir_model.instanciate(cr, SUPERUSER_ID, model_name, {})
+        cr.execute('select model, transient from ir_model where state=%s', ('manual',))
+        for (model_name, transient) in cr.fetchall():
+            ir_model.instanciate(cr, SUPERUSER_ID, model_name, transient, {})
 
         # prepare the setup on all models
         for model in self.models.itervalues():