diff --git a/src/Zend/Media/Mpeg/Abs/VbriHeader.php b/src/Zend/Media/Mpeg/Abs/VbriHeader.php
index 057085e..553455a 100644
--- a/src/Zend/Media/Mpeg/Abs/VbriHeader.php
+++ b/src/Zend/Media/Mpeg/Abs/VbriHeader.php
@@ -73,6 +73,8 @@ class Zend_Media_Mpeg_Abs_VbriHeader extends Zend_Media_Mpeg_Abs_Object
      */
     public function __construct($reader, &$options = array())
     {
+        parent::__construct($reader, $options);
+        
         $offset = $this->_reader->getOffset();
         $this->_version = $this->_reader->readUInt16BE();
         $this->_delay = $this->_reader->readUInt16BE();