diff --git a/DependencyInjection/A2lixTranslationFormExtension.php b/DependencyInjection/A2lixTranslationFormExtension.php
index 0170da9..5716cd8 100644
--- a/DependencyInjection/A2lixTranslationFormExtension.php
+++ b/DependencyInjection/A2lixTranslationFormExtension.php
@@ -30,8 +30,9 @@ public function load(array $configs, ContainerBuilder $container)
 
         $container->setParameter('a2lix_translation_form.locale_provider', $config['locale_provider']);
         $container->setParameter('a2lix_translation_form.locales', $config['locales']);
-        $container->setParameter('a2lix_translation_form.default_locale', $container->getParameter('kernel.default_locale', 'en'));
         $container->setParameter('a2lix_translation_form.required_locales', $config['required_locales']);
+        $container->setParameter('a2lix_translation_form.default_locale', $config['default_locale'] ?: 
+            $container->getParameter('kernel.default_locale', 'en'));
 
         $container->setParameter('a2lix_translation_form.templating', $config['templating']);
 
diff --git a/DependencyInjection/Configuration.php b/DependencyInjection/Configuration.php
index 6b852b2..3954ef7 100644
--- a/DependencyInjection/Configuration.php
+++ b/DependencyInjection/Configuration.php
@@ -22,6 +22,7 @@ public function getConfigTreeBuilder()
         $rootNode
             ->children()
                 ->scalarNode('locale_provider')->defaultValue('default')->end()
+                ->scalarNode('default_locale')->defaultNull()->end()
                 ->arrayNode('locales')
                     ->beforeNormalization()
                         ->ifString()