diff --git a/src/Symfony/Bridge/Twig/Extension/YamlExtension.php b/src/Symfony/Bridge/Twig/Extension/YamlExtension.php
index 8ebca50d564f1..c488893ff89fc 100644
--- a/src/Symfony/Bridge/Twig/Extension/YamlExtension.php
+++ b/src/Symfony/Bridge/Twig/Extension/YamlExtension.php
@@ -31,7 +31,7 @@ public function getFilters()
         );
     }
 
-    public function encode($input, $inline = 0, $dumpObjects = false)
+    public function encode($input, $inline = 0, $dumpObjects = 0)
     {
         static $dumper;