diff --git a/bin/addons/base/ir/ir_filters.py b/bin/addons/base/ir/ir_filters.py
index 541dbdb60c6..0146b8dd85b 100644
--- a/bin/addons/base/ir/ir_filters.py
+++ b/bin/addons/base/ir/ir_filters.py
@@ -60,7 +60,7 @@ class ir_filters(osv.osv):
         'user_id':fields.many2one('res.users', 'User', help='False means for every user'),
         'domain': fields.text('Domain Value', required=True),
         'context': fields.text('Context Value', required=True),
-        'model_id': fields.selection(_list_all_models, 'Object', required=True),
+        'model_id': fields.selection(_list_all_models, 'Object', size=64, required=True),
     }
 
 ir_filters()