diff --git a/Doc/Tdoc/projects.xml b/Doc/Tdoc/projects.xml
index 03081ca0fa7b20a6750342de4a830ecca5a824ee..a6b49845ca6a3ae9f7df7dfaedac905a3c5ebcee 100644
--- a/Doc/Tdoc/projects.xml
+++ b/Doc/Tdoc/projects.xml
@@ -1,12 +1,13 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<chapter version="5.0" xmlns="http://docbook.org/ns/docbook"
+<chapter version="5.0" xml:id="tdocChapProjects"
+         xmlns="http://docbook.org/ns/docbook"
          xmlns:xlink="http://www.w3.org/1999/xlink"
          xmlns:xi="http://www.w3.org/2001/XInclude"
          xmlns:svg="http://www.w3.org/2000/svg"
          xmlns:m="http://www.w3.org/1998/Math/MathML"
          xmlns:html="http://www.w3.org/1999/xhtml"
          xmlns:db="http://docbook.org/ns/docbook">
-  <title xml:id="tdocChapProjects">Possible projects</title>
+  <title>Possible projects</title>
 
   <orderedlist>
     <listitem>