diff --git a/library/Zend/Log/Filter/Timestamp.php b/library/Zend/Log/Filter/Timestamp.php
index a3c0ccb5d6e..5390657bedb 100644
--- a/library/Zend/Log/Filter/Timestamp.php
+++ b/library/Zend/Log/Filter/Timestamp.php
@@ -9,8 +9,9 @@
 
 namespace Zend\Log\Filter;
 
-use Zend\Log\Exception;
 use DateTime;
+use Traversable;
+use Zend\Log\Exception;
 
 /**
  * Filters log events based on the time when they were triggered.