diff --git a/reference/imagick/imagick/toString.xml b/reference/imagick/imagick/toString.xml
index 45fd2a12f4..49e298660c 100644
--- a/reference/imagick/imagick/toString.xml
+++ b/reference/imagick/imagick/toString.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <!-- $Revision$ -->
 
-<refentry xml:id="classname.methodname" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
+<refentry xml:id="imagick.tostring" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
  <refnamediv>
   <refname>Imagick::__toString</refname>
   <refpurpose>Returns the image as a string.</refpurpose>