diff --git a/doc/tgi.sgml b/doc/tgi.sgml
index 722583893..23b5ce6ae 100644
--- a/doc/tgi.sgml
+++ b/doc/tgi.sgml
@@ -11,6 +11,7 @@ Include the tgi.h header file to get the necessary definitions.
 </abstract>
 
 <!-- Table of contents -->
+<tt/tgi.h/<label id="tgi.h"><p>
 <toc>
 
 <!-- Begin the document -->