diff --git a/addons/mrp/wizard/change_production_qty.py b/addons/mrp/wizard/change_production_qty.py
index eebf8d29962..463c30c0a7c 100644
--- a/addons/mrp/wizard/change_production_qty.py
+++ b/addons/mrp/wizard/change_production_qty.py
@@ -22,7 +22,7 @@ class ChangeProductionQty(models.TransientModel):
         if 'mo_id' in fields and not res.get('mo_id') and self._context.get('active_model') == 'mrp.production' and self._context.get('active_id'):
             res['mo_id'] = self._context['active_id']
         if 'product_qty' in fields and not res.get('product_qty') and res.get('mo_id'):
-            res['product_qty'] = self.env['mrp.production'].browse(res.get['mo_id']).product_qty
+            res['product_qty'] = self.env['mrp.production'].browse(res['mo_id']).product_qty
         return res
 
     @api.model
diff --git a/addons/mrp/wizard/change_production_qty_views.xml b/addons/mrp/wizard/change_production_qty_views.xml
index 0ba2fc8488e..f731d2cecc1 100644
--- a/addons/mrp/wizard/change_production_qty_views.xml
+++ b/addons/mrp/wizard/change_production_qty_views.xml
@@ -10,6 +10,7 @@
                 <form string="Change Product Qty">
                     <group>
                         <field name="product_qty"/>
+                        <field name="mo_id" invisible="1"/>
                     </group>
                     <footer>
                         <button name="change_prod_qty" string="Approve"