diff --git a/src/Eccube/Repository/ProductRepository.php b/src/Eccube/Repository/ProductRepository.php
index 8b4483927f6..8758fb49de4 100644
--- a/src/Eccube/Repository/ProductRepository.php
+++ b/src/Eccube/Repository/ProductRepository.php
@@ -141,18 +141,14 @@ public function getQueryBuilderBySearchData($searchData)
             //@see http://doctrine-orm.readthedocs.org/en/latest/reference/dql-doctrine-query-language.html
             $qb->addSelect('MIN(pc.price02) as HIDDEN price02_min');
             $qb->innerJoin('p.ProductClasses', 'pc');
-            $qb->groupBy('p');
-            // postgres9.0以下は, groupBy('p.id')が利用できない
-            // mysqlおよびpostgresql9.1以上であればgroupBy('p.id')にすることで性能向上が期待できる.
-            // @see https://github.com/EC-CUBE/ec-cube/issues/1904
-            // $qb->groupBy('p.id');
+            $qb->groupBy('p.id');
             $qb->orderBy('price02_min', 'ASC');
             $qb->addOrderBy('p.id', 'DESC');
             // 価格高い順
         } else if (!empty($searchData['orderby']) && $searchData['orderby']->getId() == $config['eccube_product_order_price_higher']) {
             $qb->addSelect('MAX(pc.price02) as HIDDEN price02_max');
             $qb->innerJoin('p.ProductClasses', 'pc');
-            $qb->groupBy('p');
+            $qb->groupBy('p.id');
             $qb->orderBy('price02_max', 'DESC');
             $qb->addOrderBy('p.id', 'DESC');
             // 新着順