diff --git a/htdocs/product/stock/stockatdate.php b/htdocs/product/stock/stockatdate.php
index 77923d9e7c9..194616b6cdf 100644
--- a/htdocs/product/stock/stockatdate.php
+++ b/htdocs/product/stock/stockatdate.php
@@ -116,7 +116,7 @@ if (GETPOST('button_removefilter_x', 'alpha') || GETPOST('button_removefilter.x'
 }
 
 $warehouseStatus = array();
-if ($conf->global->ENTREPOT_EXTRA_STATUS) {
+if (!empty($conf->global->ENTREPOT_EXTRA_STATUS)) {
 	//$warehouseStatus[] = Entrepot::STATUS_CLOSED;
 	$warehouseStatus[] = Entrepot::STATUS_OPEN_ALL;
 	$warehouseStatus[] = Entrepot::STATUS_OPEN_INTERNAL;