diff --git a/lib/Twig/Profiler/Profile.php b/lib/Twig/Profiler/Profile.php
index 2655d4a19..2284d5c12 100644
--- a/lib/Twig/Profiler/Profile.php
+++ b/lib/Twig/Profiler/Profile.php
@@ -14,7 +14,7 @@
  *
  * @final
  */
-class Twig_Profiler_Profile implements \IteratorAggregate, Serializable
+class Twig_Profiler_Profile implements \IteratorAggregate, \Serializable
 {
     const ROOT = 'ROOT';
     const BLOCK = 'block';