diff --git a/addons/stock_planning/stock_planning.py b/addons/stock_planning/stock_planning.py
index 7e9342292b9..35337b28bdf 100644
--- a/addons/stock_planning/stock_planning.py
+++ b/addons/stock_planning/stock_planning.py
@@ -41,7 +41,8 @@ class stock_period(osv.osv):
         'name': fields.char('Period Name', size=64, required=True),
         'date_start': fields.datetime('Start Date', required=True),
         'date_stop': fields.datetime('End Date', required=True),
-        'state': fields.selection([('draft','Draft'), ('open','Open'),('close','Close')], 'State')
+        'state': fields.selection([('draft','Draft'), ('open','Open'),('close','Close')], 'State'),
+        'planning_id': fields.many2one('stock.period.createlines', 'Stock Period Planning'),
     }
     _defaults = {
         'state': 'draft'