diff --git a/src/Symfony/Component/HttpKernel/HttpKernel.php b/src/Symfony/Component/HttpKernel/HttpKernel.php
index 36c673093b..f34d9b3225 100644
--- a/src/Symfony/Component/HttpKernel/HttpKernel.php
+++ b/src/Symfony/Component/HttpKernel/HttpKernel.php
@@ -263,6 +263,9 @@ class HttpKernel implements HttpKernelInterface, TerminableInterface
         }
     }
 
+    /**
+     * Returns a human-readable string for the specified variable.
+     */
     private function varToString($var)
     {
         if (\is_object($var)) {