diff --git a/src/Symfony/Component/VarDumper/Caster/ReflectionCaster.php b/src/Symfony/Component/VarDumper/Caster/ReflectionCaster.php
index 0bf91c8204..48c5fd6f36 100644
--- a/src/Symfony/Component/VarDumper/Caster/ReflectionCaster.php
+++ b/src/Symfony/Component/VarDumper/Caster/ReflectionCaster.php
@@ -109,6 +109,7 @@ class ReflectionCaster
 
         self::addMap($a, $c, array(
             'returnsReference' => 'returnsReference',
+            'returnType' => 'getReturnType',
             'class' => 'getClosureScopeClass',
             'this' => 'getClosureThis',
         ));