diff --git a/uc_order/uc_order.module b/uc_order/uc_order.module
index 1723ffd..2a6cfc0 100644
--- a/uc_order/uc_order.module
+++ b/uc_order/uc_order.module
@@ -483,6 +483,7 @@ function uc_order_entity_info() {
       'base table' => 'uc_order_products',
       'controller class' => 'UcOrderProductController',
       'metadata controller class' => 'UcOrderProductMetadataController',
+      'fieldable' => TRUE,
       'entity keys' => array(
         'id' => 'order_product_id',
         'label' => t('Order product'),