diff --git a/core/lib/Drupal/Component/Annotation/Plugin.php b/core/lib/Drupal/Component/Annotation/Plugin.php
index 8eaa626..66b4b53 100644
--- a/core/lib/Drupal/Component/Annotation/Plugin.php
+++ b/core/lib/Drupal/Component/Annotation/Plugin.php
@@ -39,12 +39,8 @@ class Plugin implements AnnotationInterface {
    */
   public function __construct($values) {
     $reflection = new \ReflectionClass($this);
-    // Only keep actual default values by ignoring NULL values.
-    $defaults = array_filter($reflection->getDefaultProperties(), function ($value) {
-      return $value !== NULL;
-    });
     $parsed_values = $this->parse($values);
-    $this->definition = NestedArray::mergeDeep($defaults, $parsed_values);
+    $this->definition = NestedArray::mergeDeep($reflection->getDefaultProperties(), $parsed_values);
   }
 
   /**