diff --git a/htdocs/product/class/html.formproduct.class.php b/htdocs/product/class/html.formproduct.class.php
index a0ebda88cd9..4f388798074 100644
--- a/htdocs/product/class/html.formproduct.class.php
+++ b/htdocs/product/class/html.formproduct.class.php
@@ -218,6 +218,7 @@ class FormProduct
 
 		$out='';
 		if (empty($conf->global->ENTREPOT_EXTRA_STATUS)) $filterstatus = '';
+        if (!empty($fk_product))  $this->cache_warehouses = array();
 		$this->loadWarehouses($fk_product, '', $filterstatus, true, $exclude);
 		$nbofwarehouses=count($this->cache_warehouses);