diff --git a/src/Symfony/Component/DependencyInjection/DefinitionDecorator.php b/src/Symfony/Component/DependencyInjection/DefinitionDecorator.php
index f23f854481feb..25109d16b5e80 100644
--- a/src/Symfony/Component/DependencyInjection/DefinitionDecorator.php
+++ b/src/Symfony/Component/DependencyInjection/DefinitionDecorator.php
@@ -15,15 +15,15 @@
 
 class_exists(ChildDefinition::class);
 
-return;
-
-/**
- * This definition decorates another definition.
- *
- * @author Johannes M. Schmitt <schmittjoh@gmail.com>
- *
- * @deprecated The DefinitionDecorator class is deprecated since version 3.3 and will be removed in 4.0. Use the Symfony\Component\DependencyInjection\ChildDefinition class instead.
- */
-class DefinitionDecorator extends Definition
-{
+if (false) {
+    /**
+     * This definition decorates another definition.
+     *
+     * @author Johannes M. Schmitt <schmittjoh@gmail.com>
+     *
+     * @deprecated The DefinitionDecorator class is deprecated since version 3.3 and will be removed in 4.0. Use the Symfony\Component\DependencyInjection\ChildDefinition class instead.
+     */
+    class DefinitionDecorator extends Definition
+    {
+    }
 }