diff --git a/htdocs/product/class/api_products.class.php b/htdocs/product/class/api_products.class.php
index 2566ca24919..e34b270562e 100644
--- a/htdocs/product/class/api_products.class.php
+++ b/htdocs/product/class/api_products.class.php
@@ -253,7 +253,7 @@ class Products extends DolibarrApi
 				if (!$ids_only) {
 					$product_static = new Product($this->db);
 					if ($product_static->fetch($obj->rowid)) {
-						if ($includestockdata && DolibarrApiAccess::$user->rights->stock->lire) {
+						if (!empty($includestockdata) && DolibarrApiAccess::$user->rights->stock->lire) {
 							$product_static->load_stock();
 
 							if (is_array($product_static->stock_warehouse)) {
@@ -1644,10 +1644,10 @@ class Products extends DolibarrApi
 			$combinations[$key]->attributes = $prodc2vp->fetchByFkCombination((int) $combination->id);
 			$combinations[$key] = $this->_cleanObjectDatas($combinations[$key]);
 
-			if ($includestock==1 && DolibarrApiAccess::$user->rights->stock->lire) {
+			if (!empty($includestock) && DolibarrApiAccess::$user->rights->stock->lire) {
 				$productModel = new Product($this->db);
 				$productModel->fetch((int) $combination->fk_product_child);
-				$productModel->load_stock();
+				$productModel->load_stock($includestock);
 				$combinations[$key]->stock_warehouse = $this->_cleanObjectDatas($productModel)->stock_warehouse;
 			}
 		}
@@ -2040,8 +2040,8 @@ class Products extends DolibarrApi
 			throw new RestException(401, 'Access not allowed for login '.DolibarrApiAccess::$user->login);
 		}
 
-		if ($includestockdata && DolibarrApiAccess::$user->rights->stock->lire) {
-			$this->product->load_stock();
+		if (!empty($includestockdata) && DolibarrApiAccess::$user->rights->stock->lire) {
+			$this->product->load_stock($includestockdata);
 
 			if (is_array($this->product->stock_warehouse)) {
 				foreach ($this->product->stock_warehouse as $keytmp => $valtmp) {