diff --git a/src/Symfony/Component/Config/Definition/VariableNode.php b/src/Symfony/Component/Config/Definition/VariableNode.php
index 056018130d..8d24f25d70 100644
--- a/src/Symfony/Component/Config/Definition/VariableNode.php
+++ b/src/Symfony/Component/Config/Definition/VariableNode.php
@@ -75,7 +75,6 @@ class VariableNode extends BaseNode implements PrototypeNodeInterface
      */
     protected function validateType($value)
     {
-        return true;
     }
 
     /**