diff --git a/addons/mrp/stock.py b/addons/mrp/stock.py
index 00c6abe9264..8a07990c48c 100644
--- a/addons/mrp/stock.py
+++ b/addons/mrp/stock.py
@@ -39,8 +39,8 @@ class stock_warehouse_orderpoint(osv.osv):
         'name': fields.char('Name', size=32, required=True),
         'active': fields.boolean('Active', help="If the active field is set to true, it will allow you to hide the orderpoint without removing it."),
         'logic': fields.selection([('max','Order to Max'),('price','Best price (not yet active!)')], 'Reordering Mode', required=True),
-        'warehouse_id': fields.many2one('stock.warehouse', 'Warehouse', required=True),
-        'location_id': fields.many2one('stock.location', 'Location', required=True),
+        'warehouse_id': fields.many2one('stock.warehouse', 'Warehouse', required=True, ondelete="cascade"),
+        'location_id': fields.many2one('stock.location', 'Location', required=True, ondelete="cascade"),
         'product_id': fields.many2one('product.product', 'Product', required=True, ondelete='cascade', domain=[('type','=','product')]),
         'product_uom': fields.many2one('product.uom', 'Product UOM', required=True ),
         'product_min_qty': fields.float('Min Quantity', required=True,