diff --git a/core/includes/install.core.inc b/core/includes/install.core.inc
index 5542f42..fbc7c02 100644
--- a/core/includes/install.core.inc
+++ b/core/includes/install.core.inc
@@ -1450,11 +1450,11 @@ function install_translations_directory() {
  */
 function install_register_translation_service(ContainerBuilder $container) {
   $container->register('string_translator.file_translation', 'Drupal\Core\StringTranslation\Translator\FileTranslation')
-    ->addArgument(install_translations_directory())
-    ->addTag('string_translator');
-  $container->register('string_translator.custom_strings', 'Drupal\Core\StringTranslation\Translator\CustomStrings')
-    ->addTag('string_translator');
-  $container->register('string_translation', 'Drupal\Core\StringTranslation\TranslationManager');
+    ->addArgument(install_translations_directory());
+  $container->register('string_translator.custom_strings', 'Drupal\Core\StringTranslation\Translator\CustomStrings');
+  $container->register('string_translation', 'Drupal\Core\StringTranslation\TranslationManager')
+    ->addMethodCall('addTranslator', array(new Reference('string_translator.file_translation')))
+    ->addMethodCall('addTranslator', array(new Reference('string_translator.custom_strings')));
 }
 
 /**