diff --git a/symfony/framework-bundle/3.3/src/Kernel.php b/symfony/framework-bundle/3.3/src/Kernel.php
index 19fcdd60..e60b87aa 100644
--- a/symfony/framework-bundle/3.3/src/Kernel.php
+++ b/symfony/framework-bundle/3.3/src/Kernel.php
@@ -12,7 +12,7 @@ class Kernel extends BaseKernel
 {
     use MicroKernelTrait;
 
-    private const CONFIG_EXTS = '.{php,xml,yaml,yml}';
+    const CONFIG_EXTS = '.{php,xml,yaml,yml}';
 
     public function getCacheDir(): string
     {