diff --git a/web/modules/custom/example/src/Builder/PostBuilder.php b/web/modules/custom/example/src/Builder/PostBuilder.php
index e24e07c..389e04b 100644
--- a/web/modules/custom/example/src/Builder/PostBuilder.php
+++ b/web/modules/custom/example/src/Builder/PostBuilder.php
@@ -34,11 +34,14 @@ final class PostBuilder {
 
   public function getPost(): NodeInterface {
     $post = Node::create([
-      'created' => $this?->created->getTimestamp(),
       'title' => $this->title,
       'type' => 'post',
     ]);
 
+    if ($this->created !== NULL) {
+      $post->setCreatedTime($this->created->getTimestamp());
+    }
+
     $post->save();
 
     return $post;