diff --git a/addons/stock/wizard/stock_partial_picking.py b/addons/stock/wizard/stock_partial_picking.py
index bbc9021d87c..2d4422986d5 100644
--- a/addons/stock/wizard/stock_partial_picking.py
+++ b/addons/stock/wizard/stock_partial_picking.py
@@ -97,7 +97,6 @@ class stock_partial_picking(osv.osv_memory):
                             'string': _('Production Lot'),
                             'type': 'many2one',
                             'relation': 'stock.production.lot',
-                            'readonly': True,
                         }
                     })