diff --git a/src/Entity/ShipmentServiceOptions.php b/src/Entity/ShipmentServiceOptions.php
index ba03abc..92a5eca 100644
--- a/src/Entity/ShipmentServiceOptions.php
+++ b/src/Entity/ShipmentServiceOptions.php
@@ -210,6 +210,10 @@ public function toNode(DOMDocument $document = null)
             }
         }
 
+        if (isset($this->UPScarbonneutralIndicator)) {
+            $node->appendChild($document->createElement('UPScarbonneutralIndicator'));
+        }
+
         return $node;
     }