diff --git a/stock_reserve/model/product.py b/stock_reserve/model/product.py
index fd9ea385b..5256f3d16 100644
--- a/stock_reserve/model/product.py
+++ b/stock_reserve/model/product.py
@@ -60,7 +60,7 @@ class ProductProduct(models.Model):
         compute='_reservation_count',
         string='# Sales')
 
-    @api.multi
+    @api.one
     def _reservation_count(self):
         StockReservation = self.env['stock.reservation']
         product_id = self._ids[0]