diff --git a/core/lib/Drupal/Component/Serialization/Yaml.php b/core/lib/Drupal/Component/Serialization/Yaml.php
index 8c08314..6f6994b 100644
--- a/core/lib/Drupal/Component/Serialization/Yaml.php
+++ b/core/lib/Drupal/Component/Serialization/Yaml.php
@@ -28,7 +28,7 @@ class Yaml implements SerializationInterface {
    * {@inheritdoc}
    */
   public static function encode($data) {
-    YamlSymfony::encode($data);
+    return YamlSymfony::encode($data);
   }
 
   /**