diff --git a/core/lib/Drupal/Core/Config/Config.php b/core/lib/Drupal/Core/Config/Config.php
index 97e94b8..2b54da8 100644
--- a/core/lib/Drupal/Core/Config/Config.php
+++ b/core/lib/Drupal/Core/Config/Config.php
@@ -671,7 +671,7 @@ public function getOriginal($key = '', $apply_overrides = TRUE) {
   public static function getSchemaName($config_name) {
     $schema_name = $config_name;
     // @todo figure out how to allow expandibility.
-    $optional_prefixes = array(preg_quote(ConfigFactoryInterface::LANGUAGE_CONFIG_PREFIX) . '\.[^\.]*\.');
+    $optional_prefixes = array(preg_quote(ConfigFactoryInterface::LANGUAGE_CONFIG_PREFIX) . '\.[^\.]+\.');
     foreach ($optional_prefixes as $prefix) {
       $schema_name = preg_replace('/^'.  $prefix . '(.+)/', '\1', $config_name);
     }