diff --git a/includes/frontend/class-wcmp-checkout.php b/includes/frontend/class-wcmp-checkout.php
index 40edc0642..561f4da08 100644
--- a/includes/frontend/class-wcmp-checkout.php
+++ b/includes/frontend/class-wcmp-checkout.php
@@ -581,7 +581,10 @@ private function getShippingMethodsAllowingDeliveryOptions(): array
             return $allowedMethods;
         }
 
-        $shippingMethodsForPackage = $shippingMethodsByPackageType[AbstractConsignment::PACKAGE_TYPE_PACKAGE_NAME];
+        $shippingMethodsForPackage = array_merge(
+            $shippingMethodsByPackageType[AbstractConsignment::PACKAGE_TYPE_PACKAGE_NAME] ?? [],
+            $shippingMethodsByPackageType[AbstractConsignment::PACKAGE_TYPE_PACKAGE_SMALL_NAME] ?? []
+        );
 
         foreach ($shippingMethodsForPackage as $shippingMethod) {
             [$methodId] = self::splitShippingMethodString($shippingMethod);