diff --git a/src/Zend/Media/Id3/Frame/Ufid.php b/src/Zend/Media/Id3/Frame/Ufid.php
index 90981e5..caeca46 100644
--- a/src/Zend/Media/Id3/Frame/Ufid.php
+++ b/src/Zend/Media/Id3/Frame/Ufid.php
@@ -73,7 +73,8 @@ final class Zend_Media_Id3_Frame_Ufid extends Zend_Media_Id3_Frame
         }
 
         list($this->_owner, $this->_fileIdentifier) =
-            $this->_explodeString8($this->_data, 2);
+            $this->_explodeString8
+                ($this->_reader->read($this->_reader->getSize()), 2);
     }
 
     /**