diff --git a/mongodb_field_storage/mongodb_field_storage.module b/mongodb_field_storage/mongodb_field_storage.module
index ab6c42b..d4e5476 100644
--- a/mongodb_field_storage/mongodb_field_storage.module
+++ b/mongodb_field_storage/mongodb_field_storage.module
@@ -127,7 +127,11 @@ function mongodb_field_storage_field_storage_write($entity_type, $entity, $op, $
   }
 
   // Create a new object.
-  $new_entity = new stdClass();
+  $new_entity = clone $entity;
+  if (isset($new_entity->original)) {
+    unset($new_entity->original);
+  }
+
   $new_entity->_id = intval($entity_id);
   $new_entity->_type = $entity_type;
   $new_entity->_bundle = $bundle;