diff --git a/core/modules/aggregator/lib/Drupal/aggregator/Plugin/AggregatorPluginSettingsBase.php b/core/modules/aggregator/lib/Drupal/aggregator/Plugin/AggregatorPluginSettingsBase.php
index aa972e5..a7757ba 100644
--- a/core/modules/aggregator/lib/Drupal/aggregator/Plugin/AggregatorPluginSettingsBase.php
+++ b/core/modules/aggregator/lib/Drupal/aggregator/Plugin/AggregatorPluginSettingsBase.php
@@ -24,5 +24,11 @@ public function settingsForm(array $form, array &$form_state) {
   /**
    * {@inheritdoc}
    */
+  public function settingsValidate(array $form, array &$form_state) {}
+
+  /**
+   * {@inheritdoc}
+   */
   public function settingsSubmit(array $form, array &$form_state) {}
+
 }
diff --git a/core/modules/aggregator/lib/Drupal/aggregator/Plugin/AggregatorPluginSettingsInterface.php b/core/modules/aggregator/lib/Drupal/aggregator/Plugin/AggregatorPluginSettingsInterface.php
index 3248814..d9310f0 100644
--- a/core/modules/aggregator/lib/Drupal/aggregator/Plugin/AggregatorPluginSettingsInterface.php
+++ b/core/modules/aggregator/lib/Drupal/aggregator/Plugin/AggregatorPluginSettingsInterface.php
@@ -22,10 +22,25 @@
    *
    * @return array
    *   The form elements for the plugin settings.
+   *
+   * @see \Drupal\aggregator\Plugin\AggregatorPluginSettingsInterface::settingsValidate()
+   * @see \Drupal\aggregator\Plugin\AggregatorPluginSettingsInterface::settingsSubmit()
    */
   public function settingsForm(array $form, array &$form_state);
 
   /**
+   * Adds plugin specific validation handling for the configuration form.
+   *
+   * @param array $form
+   *   The form definition array where the settings form is being included in.
+   * @param array $form_state
+   *   An associative array containing the current state of the form.
+   *
+   * @see \Drupal\aggregator\Plugin\AggregatorPluginSettingsInterface::settingsSubmit()
+   */
+  public function settingsValidate(array $form, array &$form_state);
+
+  /**
    * Adds plugin specific submission handling for the configuration form.
    *
    * @param array $form
@@ -33,7 +48,7 @@ public function settingsForm(array $form, array &$form_state);
    * @param array $form_state
    *   An associative array containing the current state of the form.
    *
-   * @see \Drupal\aggregator\Plugin\AggregatorPluginSettingsInterface::settingsForm()
+   * @see \Drupal\aggregator\Plugin\AggregatorPluginSettingsInterface::settingsValidate()
    */
   public function settingsSubmit(array $form, array &$form_state);