diff --git a/admin/model/extension/retailcrm/icml.php b/admin/model/extension/retailcrm/icml.php
index 5535e3a..fc4b823 100644
--- a/admin/model/extension/retailcrm/icml.php
+++ b/admin/model/extension/retailcrm/icml.php
@@ -198,6 +198,11 @@ class ModelExtensionRetailcrmIcml extends Model
                     $e->setAttribute('productId', $product['product_id']);
                     $e->setAttribute('quantity', $product['quantity']);
                 }
+                /**
+                 * xmlID = product_id
+                 */
+                $e->appendChild($this->dd->createElement('xmlId'))
+                    ->appendChild($this->dd->createTextNode($product['product_id']));
                 /**
                  * Offer activity
                  */