diff --git a/core/lib/Drupal/Core/Config/BootstrapConfigStorageFactory.php b/core/lib/Drupal/Core/Config/BootstrapConfigStorageFactory.php
index f548701..1d3da6b 100644
--- a/core/lib/Drupal/Core/Config/BootstrapConfigStorageFactory.php
+++ b/core/lib/Drupal/Core/Config/BootstrapConfigStorageFactory.php
@@ -7,7 +7,6 @@
 
 namespace Drupal\Core\Config;
 
-
 /**
  * Defines a factory for retrieving the config storage used pre-kernel.
  */
@@ -20,8 +19,8 @@ class BootstrapConfigStorageFactory {
    *   A configuration storage implementation.
    */
   public static function get() {
-    if (isset($GLOBALS['conf']['drupal_bootstrap_config_storage'])) {
-      return call_user_func($GLOBALS['conf']['drupal_bootstrap_config_storage']);
+    if (($drupal_bootstrap_config_storage = settings()->get('drupal_bootstrap_config_storage')) && is_callable($drupal_bootstrap_config_storage)) {
+      return $drupal_bootstrap_config_storage();
     }
     else {
       return new FileStorage(config_get_config_directory(CONFIG_ACTIVE_DIRECTORY));