diff --git a/addons/stock/stock.py b/addons/stock/stock.py
index 0d8b1933f20..c88b52c4199 100644
--- a/addons/stock/stock.py
+++ b/addons/stock/stock.py
@@ -1515,7 +1515,7 @@ class stock_move(osv.osv):
         'origin': fields.related('picking_id','origin',type='char', size=64, relation="stock.picking", string="Origin", store=True),
 
         # used for colors in tree views:
-        'scrapped': fields.related('location_dest_id','scrap_location',type='boolean',relation='stock.location',string='Scrapped'),
+        'scrapped': fields.related('location_dest_id','scrap_location',type='boolean',relation='stock.location',string='Scrapped', readonly=True),
     }
     _constraints = [
         (_check_tracking,