diff --git a/src/Symfony/Component/DependencyInjection/Dumper/PhpDumper.php b/src/Symfony/Component/DependencyInjection/Dumper/PhpDumper.php
index a18d1665c5..3e586ff71e 100644
--- a/src/Symfony/Component/DependencyInjection/Dumper/PhpDumper.php
+++ b/src/Symfony/Component/DependencyInjection/Dumper/PhpDumper.php
@@ -969,7 +969,7 @@ $bagClass
  */
 class $class extends $baseClass
 {
-    private \$parameters;
+    private \$parameters = [];
     private \$targetDirs = [];
 
     public function __construct()