diff --git a/src/Symfony/Component/DependencyInjection/Loader/FileLoader.php b/src/Symfony/Component/DependencyInjection/Loader/FileLoader.php
index 163d886354..ceb0f0113e 100644
--- a/src/Symfony/Component/DependencyInjection/Loader/FileLoader.php
+++ b/src/Symfony/Component/DependencyInjection/Loader/FileLoader.php
@@ -26,7 +26,7 @@ use Symfony\Component\DependencyInjection\Exception\InvalidArgumentException;
  */
 abstract class FileLoader extends BaseFileLoader
 {
-    public const ANONYMOUS_ID_REGEXP = '/^\.\d+_[^~]++~[._a-zA-Z\d]{7}$/';
+    public const ANONYMOUS_ID_REGEXP = '/^\.\d+_[^~]*+~[._a-zA-Z\d]{7}$/';
 
     protected $container;
     protected $isLoadingInstanceof = false;