diff --git a/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/FrameworkExtension.php b/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/FrameworkExtension.php
index d1699672dd..247222c95d 100644
--- a/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/FrameworkExtension.php
+++ b/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/FrameworkExtension.php
@@ -533,6 +533,9 @@ class FrameworkExtension extends Extension
         // Use the "real" translator instead of the identity default
         $container->setAlias('translator', 'translator.default');
         $translator = $container->findDefinition('translator.default');
+        if (!is_array($config['fallback'])) {
+            $config['fallback'] = array($config['fallback']);
+        }
         $translator->addMethodCall('setFallbackLocales', array($config['fallback']));
 
         // Discover translation directories
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/FrameworkExtensionTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/FrameworkExtensionTest.php
index 0706eb02b3..718a0f77bf 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/FrameworkExtensionTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/FrameworkExtensionTest.php
@@ -219,7 +219,7 @@ abstract class FrameworkExtensionTest extends TestCase
         );
 
         $calls = $container->getDefinition('translator.default')->getMethodCalls();
-        $this->assertEquals('fr', $calls[0][1][0]);
+        $this->assertEquals(array('fr'), $calls[0][1][0]);
     }
 
     /**