diff --git a/modules/ubercart/src/EventSubscriber/PrepareRow.php b/modules/ubercart/src/EventSubscriber/PrepareRow.php
index 83d4ed1..eb03ea4 100644
--- a/modules/ubercart/src/EventSubscriber/PrepareRow.php
+++ b/modules/ubercart/src/EventSubscriber/PrepareRow.php
@@ -111,6 +111,7 @@ class PrepareRow implements EventSubscriberInterface {
         }
       }
       else {
+        // This field is used on just nodes. Set the entity_type to 'node'.
         $row->setSourceProperty('entity_type', 'node');
       }
     }