diff --git a/htdocs/product/card.php b/htdocs/product/card.php
index 9c315591903..7953bddb2fd 100644
--- a/htdocs/product/card.php
+++ b/htdocs/product/card.php
@@ -1601,8 +1601,10 @@ else
 				$c = new Categorie($db);
 				$cats = $c->containing($object->id, Categorie::TYPE_PRODUCT);
 				$arrayselected = array();
-				foreach ($cats as $cat) {
-					$arrayselected[] = $cat->id;
+				if (is_array($cats)) {
+					foreach ($cats as $cat) {
+						$arrayselected[] = $cat->id;
+					}
 				}
 				print $form->multiselectarray('categories', $cate_arbo, $arrayselected, '', 0, '', 0, '100%');
 				print "</td></tr>";