diff --git a/src/Zend/Media/Iso14496/Box/Id32.php b/src/Zend/Media/Iso14496/Box/Id32.php
index 3645bae..6c86c0e 100644
--- a/src/Zend/Media/Iso14496/Box/Id32.php
+++ b/src/Zend/Media/Iso14496/Box/Id32.php
@@ -34,6 +34,7 @@
 
 /**#@+ @ignore */
 require_once 'Zend/Media/Iso14496/FullBox.php';
+require_once 'Zend/Media/Id3v2.php';
 /**#@-*/
 
 /**