diff --git a/core/lib/Drupal/Core/EventSubscriber/ConfigImportSubscriber.php b/core/lib/Drupal/Core/EventSubscriber/ConfigImportSubscriber.php
index ba54de3..6cd3129 100644
--- a/core/lib/Drupal/Core/EventSubscriber/ConfigImportSubscriber.php
+++ b/core/lib/Drupal/Core/EventSubscriber/ConfigImportSubscriber.php
@@ -41,7 +41,6 @@ public function onConfigImporterValidate(ConfigImporterEvent $event) {
    */
   static function getSubscribedEvents() {
     $events['config.importer.validate'][] = array('onConfigImporterValidate', 40);
-    $events['config.installer.validate'][] = array('onConfigImporterValidate', 40);
     return $events;
   }