diff --git a/classes/Product.php b/classes/Product.php
index e8b95d2bd..64b742507 100644
--- a/classes/Product.php
+++ b/classes/Product.php
@@ -1978,13 +1978,7 @@ class ProductCore extends ObjectModel
 					FROM `'._DB_PREFIX_.'product` p
 					'.Shop::addSqlAssociation('product', 'p').'
 					WHERE product_shop.`active` = 1
-					AND DATEDIFF(
-						product_shop.`date_add`,
-						DATE_SUB(
-							NOW(),
-							INTERVAL '.(Validate::isUnsignedInt(Configuration::get('PS_NB_DAYS_NEW_PRODUCT')) ? Configuration::get('PS_NB_DAYS_NEW_PRODUCT') : 20).' DAY
-						)
-					) > 0
+					AND product_shop.`date_add` > "'.date('Y-m-d', strtotime('-'.(Configuration::get('PS_NB_DAYS_NEW_PRODUCT') ? (int)Configuration::get('PS_NB_DAYS_NEW_PRODUCT') : 20).' DAY')).'"
 					'.($front ? ' AND product_shop.`visibility` IN ("both", "catalog")' : '').'
 					AND p.`id_product` IN (
 						SELECT cp.`id_product`
@@ -1999,13 +1993,7 @@ class ProductCore extends ObjectModel
 		$sql->select(
 			'p.*, product_shop.*, stock.out_of_stock, IFNULL(stock.quantity, 0) as quantity, pl.`description`, pl.`description_short`, pl.`link_rewrite`, pl.`meta_description`,
 			pl.`meta_keywords`, pl.`meta_title`, pl.`name`, MAX(image_shop.`id_image`) id_image, il.`legend`, m.`name` AS manufacturer_name,
-			DATEDIFF(
-				product_shop.`date_add`,
-				DATE_SUB(
-					NOW(),
-					INTERVAL '.(Validate::isUnsignedInt(Configuration::get('PS_NB_DAYS_NEW_PRODUCT')) ? Configuration::get('PS_NB_DAYS_NEW_PRODUCT') : 20).' DAY
-				)
-			) > 0 AS new'
+			product_shop.`date_add` > "'.date('Y-m-d', strtotime('-'.(Configuration::get('PS_NB_DAYS_NEW_PRODUCT') ? (int)Configuration::get('PS_NB_DAYS_NEW_PRODUCT') : 20).' DAY')).'" as new'
 		);
 
 		$sql->from('product', 'p');
@@ -2020,25 +2008,15 @@ class ProductCore extends ObjectModel
 		$sql->leftJoin('manufacturer', 'm', 'm.`id_manufacturer` = p.`id_manufacturer`');
 
 		$sql->where('product_shop.`active` = 1');
-
 		if ($front)
 			$sql->where('product_shop.`visibility` IN ("both", "catalog")');
-		$sql->where('
-			DATEDIFF(
-				product_shop.`date_add`,
-				DATE_SUB(
-					NOW(),
-					INTERVAL '.(Validate::isUnsignedInt(Configuration::get('PS_NB_DAYS_NEW_PRODUCT')) ? Configuration::get('PS_NB_DAYS_NEW_PRODUCT') : 20).' DAY
-				)
-			) > 0'
-		);
-
+		$sql->where('product_shop.`date_add` > "'.date('Y-m-d', strtotime('-'.(Configuration::get('PS_NB_DAYS_NEW_PRODUCT') ? (int)Configuration::get('PS_NB_DAYS_NEW_PRODUCT') : 20).' DAY')).'"');
 		$sql->where('p.`id_product` IN (
 			SELECT cp.`id_product`
 			FROM `'._DB_PREFIX_.'category_group` cg
 			LEFT JOIN `'._DB_PREFIX_.'category_product` cp ON (cp.`id_category` = cg.`id_category`)
-			WHERE cg.`id_group` '.$sql_groups.')'
-		);
+			WHERE cg.`id_group` '.$sql_groups.'
+		)');
 		$sql->groupBy('product_shop.id_product');
 
 		$sql->orderBy((isset($order_by_prefix) ? pSQL($order_by_prefix).'.' : '').'`'.pSQL($order_by).'` '.pSQL($order_way));