diff --git a/openerp/osv/orm.py b/openerp/osv/orm.py
index 8236f096abf..9a72523796a 100644
--- a/openerp/osv/orm.py
+++ b/openerp/osv/orm.py
@@ -3685,13 +3685,19 @@ class BaseModel(object):
 
         self.check_unlink(cr, uid)
 
-        properties = self.pool.get('ir.property')
+        ir_property = self.pool.get('ir.property')
+        
+        # Check if the records are used as default properties.
         domain = [('res_id', '=', False),
                   ('value_reference', 'in', ['%s,%s' % (self._name, i) for i in ids]),
                  ]
-        if properties.search(cr, uid, domain, context=context):
+        if ir_property.search(cr, uid, domain, context=context):
             raise except_orm(_('Error'), _('Unable to delete this document because it is used as a default property'))
 
+        # Delete the records' properties.
+        property_ids = ir_property.search(cr, uid, [('res_id', 'in', ['%s,%s' % (self._name, i) for i in ids])], context=context)
+        ir_property.unlink(cr, uid, property_ids, context=context)
+
         wf_service = netsvc.LocalService("workflow")
         for oid in ids:
             wf_service.trg_delete(uid, self._name, oid, cr)