diff --git a/core/lib/Drupal/Core/Form/ConfigFormBase.php b/core/lib/Drupal/Core/Form/ConfigFormBase.php
index 5ed650a..985bbae 100644
--- a/core/lib/Drupal/Core/Form/ConfigFormBase.php
+++ b/core/lib/Drupal/Core/Form/ConfigFormBase.php
@@ -45,6 +45,7 @@ public function buildForm(array $form, FormStateInterface $form_state) {
       '#type' => 'submit',
       '#value' => $this->t('Save configuration'),
       '#button_type' => 'primary',
+      '#submit' => ['::submitForm'],
     );
 
     // By default, render the form using theme_system_config_form().