diff --git a/src/LaraCart.php b/src/LaraCart.php
index b252694..0c6a01b 100644
--- a/src/LaraCart.php
+++ b/src/LaraCart.php
@@ -747,7 +747,7 @@ public function totalDiscount($format = true, $withItemDiscounts = true)
 
         if ($withItemDiscounts) {
             /** @var CartItem $item */
-            foreach ($this->cart->items as $item) {
+            foreach ((array) $this->cart->items as $item) {
                 $total += floatval($item->getDiscount(false));
             }
         }