diff --git a/src/Symfony/Bundle/TwigBundle/Loader/FilesystemLoader.php b/src/Symfony/Bundle/TwigBundle/Loader/FilesystemLoader.php
index 3f6179d27f..c9fcae2179 100644
--- a/src/Symfony/Bundle/TwigBundle/Loader/FilesystemLoader.php
+++ b/src/Symfony/Bundle/TwigBundle/Loader/FilesystemLoader.php
@@ -96,7 +96,7 @@ class FilesystemLoader extends BaseFilesystemLoader
                 throw $twigLoaderException;
             }
 
-            return false;
+            return null;
         }
 
         return $this->cache[$logicalName] = $file;
diff --git a/src/Symfony/Bundle/TwigBundle/Tests/Loader/FilesystemLoaderTest.php b/src/Symfony/Bundle/TwigBundle/Tests/Loader/FilesystemLoaderTest.php
index a33477bfd9..2d678fa8f3 100644
--- a/src/Symfony/Bundle/TwigBundle/Tests/Loader/FilesystemLoaderTest.php
+++ b/src/Symfony/Bundle/TwigBundle/Tests/Loader/FilesystemLoaderTest.php
@@ -123,6 +123,6 @@ class FilesystemLoaderTest extends TestCase
 
         $method = new \ReflectionMethod('Symfony\Bundle\TwigBundle\Loader\FilesystemLoader', 'findTemplate');
         $method->setAccessible(true);
-        $this->assertFalse($method->invoke($loader, 'name.format.engine', false));
+        $this->assertNull($method->invoke($loader, 'name.format.engine', false));
     }
 }