diff --git a/reference/filesystem/functions/file-get-wrapper-data.xml b/reference/filesystem/functions/file-get-wrapper-data.xml
index ef223d1692..e669ce38ec 100644
--- a/reference/filesystem/functions/file-get-wrapper-data.xml
+++ b/reference/filesystem/functions/file-get-wrapper-data.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.2 $ -->
+<!-- $Revision: 1.3 $ -->
 <!-- splitted from ./en/functions/filesystem.xml, last change in rev 1.129 -->
-  <refentry id="function.file_get_wrapper_data">
+  <refentry id="function.file-get-wrapper-data">
    <refnamediv>
     <refname>file_get_wrapper_data</refname>
     <refpurpose>Retrieves header/meta data from "wrapped" file pointers</refpurpose>