diff --git a/src/QUI/ERP/Discount/Discount.php b/src/QUI/ERP/Discount/Discount.php
index e737981113f95fc5f77f3247c96e700eacb4713a..bfbaf775e2b862ba7c19974085e56f8825e6e116 100644
--- a/src/QUI/ERP/Discount/Discount.php
+++ b/src/QUI/ERP/Discount/Discount.php
@@ -387,9 +387,11 @@ public function canUsedWith(QUI\ERP\Products\Interfaces\ProductInterface $Produc
         }
 
         // article / product check
-        foreach ($articles as $articleId) {
-            if ((int)$Product->getId() === (int)$articleId) {
-                return true;
+        if (\is_array($articles)) {
+            foreach ($articles as $articleId) {
+                if ((int)$Product->getId() === (int)$articleId) {
+                    return true;
+                }
             }
         }