diff --git a/src/Symfony/Bundle/FrameworkBundle/Command/TranslationDebugCommand.php b/src/Symfony/Bundle/FrameworkBundle/Command/TranslationDebugCommand.php
index f5cc1fb805489..ffe5074dff47f 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Command/TranslationDebugCommand.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Command/TranslationDebugCommand.php
@@ -44,7 +44,7 @@ protected function configure()
             ))
             ->setDefinition(array(
                 new InputArgument('locale', InputArgument::REQUIRED, 'The locale'),
-                new InputArgument('bundle', InputArgument::REQUIRED, 'The bundle name'),
+                new InputArgument('bundle', InputArgument::OPTIONAL, 'The bundle name'),
                 new InputOption('domain', null, InputOption::VALUE_OPTIONAL, 'The messages domain'),
                 new InputOption('only-missing', null, InputOption::VALUE_NONE, 'Displays only missing messages'),
                 new InputOption('only-unused', null, InputOption::VALUE_NONE, 'Displays only unused messages'),
@@ -54,6 +54,7 @@ protected function configure()
 The <info>%command.name%</info> command helps finding unused or missing translation
 messages and comparing them with the fallback ones by inspecting the
 templates and translation files of a given bundle.
+If option missed the command will display information about translations that located in %%kernel.root_dir%%.
 
 You can display information about bundle translations in a specific locale:
 
@@ -87,17 +88,17 @@ protected function execute(InputInterface $input, OutputInterface $output)
 
         $locale = $input->getArgument('locale');
         $domain = $input->getOption('domain');
-        $bundle = $this->getContainer()->get('kernel')->getBundle($input->getArgument('bundle'));
+        $bundlePath = $input->hasOption('bundle') ? $this->getContainer()->get('kernel')->getBundle($input->getArgument('bundle')) : $this->getContainer()->getParameter('kernel.root_dir');
         $loader = $this->getContainer()->get('translation.loader');
 
         // Extract used messages
         $extractedCatalogue = new MessageCatalogue($locale);
-        $this->getContainer()->get('translation.extractor')->extract($bundle->getPath().'/Resources/views', $extractedCatalogue);
+        $this->getContainer()->get('translation.extractor')->extract($bundlePath.'/Resources/views', $extractedCatalogue);
 
         // Load defined messages
         $currentCatalogue = new MessageCatalogue($locale);
-        if (is_dir($bundle->getPath().'/Resources/translations')) {
-            $loader->loadMessages($bundle->getPath().'/Resources/translations', $currentCatalogue);
+        if (is_dir($bundlePath.'/Resources/translations')) {
+            $loader->loadMessages($bundlePath.'/Resources/translations', $currentCatalogue);
         }
 
         // Merge defined and extracted messages to get all message ids
@@ -130,7 +131,7 @@ protected function execute(InputInterface $input, OutputInterface $output)
                 }
 
                 $fallbackCatalogue = new MessageCatalogue($fallbackLocale);
-                $loader->loadMessages($bundle->getPath().'/Resources/translations', $fallbackCatalogue);
+                $loader->loadMessages($bundlePath.'/Resources/translations', $fallbackCatalogue);
                 $fallbackCatalogues[] = $fallbackCatalogue;
             }
         }