diff --git a/core/includes/install.inc b/core/includes/install.inc
index d1c1596..63f9d40 100644
--- a/core/includes/install.inc
+++ b/core/includes/install.inc
@@ -501,7 +501,7 @@ function drupal_install_config_directories() {
     // to the drupal core repo.
     switch ($config_type) {
       case CONFIG_ACTIVE_DIRECTORY:
-        $text = 'If you change the configuration system to use file storage instead of the database for the active Drupal site configuration, this directory will contain the active configuration. By default, this directory will be empty. If you are using files to store the active configuration, and you want to move it between environments, files from this directory should be placed in the staging directory on the target server. To make this configuration active, visit admin/config/development/configuration/sync on the target server.';
+        $text = 'If you change the configuration system to use file storage instead of the database for the active Drupal site configuration, this directory will contain the active configuration. By default, this directory will be empty. If you are using files to store the active configuration, and you want to move it between environments, files from this directory should be placed in the staging directory on the target server. To make this configuration active, visit admin/config/development/configuration/sync on the target server. In order to change active configuration storage you need to alter config.storage.active service to use \Drupal\Core\Config\FileStorage instead of the default \Drupal\Core\Config\DatabaseStorage. This cannot be done via UI.';
         break;
       case CONFIG_STAGING_DIRECTORY:
         $text = 'This directory contains configuration to be imported into your Drupal site. To make this configuration active, visit admin/config/development/configuration/sync.';