diff --git a/src/Symfony/Bundle/FrameworkBundle/Routing/DelegatingLoader.php b/src/Symfony/Bundle/FrameworkBundle/Routing/DelegatingLoader.php
index 29f3072a89..fa07f832f8 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Routing/DelegatingLoader.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Routing/DelegatingLoader.php
@@ -85,7 +85,7 @@ class DelegatingLoader extends BaseDelegatingLoader
         $this->loading = false;
 
         foreach ($collection->all() as $route) {
-            if (!$controller = $route->getDefault('_controller')) {
+            if (!is_string($controller = $route->getDefault('_controller')) || !$controller) {
                 continue;
             }
 
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/Bundle/TestBundle/Resources/config/routing.yml b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/Bundle/TestBundle/Resources/config/routing.yml
index 57d83eb9c6..11b85a86d3 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/Bundle/TestBundle/Resources/config/routing.yml
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/Bundle/TestBundle/Resources/config/routing.yml
@@ -44,3 +44,7 @@ fragment_home:
 fragment_inlined:
     path:     /fragment_inlined
     defaults: { _controller: TestBundle:Fragment:inlined }
+
+array_controller:
+    path:     /array_controller
+    defaults: { _controller: [ArrayController, someAction] }