diff --git a/addons/stock/stock.py b/addons/stock/stock.py
index 7fe9a8fc23d..04071e9f3ac 100644
--- a/addons/stock/stock.py
+++ b/addons/stock/stock.py
@@ -1893,6 +1893,7 @@ class stock_move(osv.osv):
         warning = {}
 
         if (not product_id) or (product_qty <=0.0):
+            result['product_qty'] = 0.0
             return {'value': result}
 
         product_obj = self.pool.get('product.product')
@@ -1931,6 +1932,7 @@ class stock_move(osv.osv):
         warning = {}
 
         if (not product_id) or (product_uos_qty <=0.0):
+            result['product_uos_qty'] = 0.0
             return {'value': result}
 
         product_obj = self.pool.get('product.product')