diff --git a/core/lib/Drupal/Component/Plugin/PluginBase.php b/core/lib/Drupal/Component/Plugin/PluginBase.php
index 67691784b3ca9e2e975f57a51e9ce7369365dcd8..6a8955b0a1f5106dd2c5a4840c3ede69019a3ca9 100644
--- a/core/lib/Drupal/Component/Plugin/PluginBase.php
+++ b/core/lib/Drupal/Component/Plugin/PluginBase.php
@@ -22,7 +22,7 @@ abstract class PluginBase implements PluginInspectionInterface, DerivativeInspec
   /**
    * The plugin implementation definition.
    *
-   * @var array
+   * @var \Drupal\Component\Plugin\Definition\PluginDefinitionInterface|array
    */
   protected $pluginDefinition;
 
diff --git a/core/lib/Drupal/Component/Plugin/PluginInspectionInterface.php b/core/lib/Drupal/Component/Plugin/PluginInspectionInterface.php
index ab89a06f16af9d589eecc5545054da7d891ce0d2..9924c2b09782535a9de300944ced126faeb2301a 100644
--- a/core/lib/Drupal/Component/Plugin/PluginInspectionInterface.php
+++ b/core/lib/Drupal/Component/Plugin/PluginInspectionInterface.php
@@ -23,7 +23,7 @@ public function getPluginId();
   /**
    * Gets the definition of the plugin implementation.
    *
-   * @return array
+   * @return \Drupal\Component\Plugin\Definition\PluginDefinitionInterface|array
    *   The plugin definition, as returned by the discovery object used by the
    *   plugin manager.
    */