diff --git a/doc/tgi.sgml b/doc/tgi.sgml
index 0fef963f3..d20df40d1 100644
--- a/doc/tgi.sgml
+++ b/doc/tgi.sgml
@@ -10,7 +10,7 @@
 <abstract>
 The cc65 library provides functions for platform independent graphics.
 Include the tgi.h header file to get the necessary definitions, see also
-<tt/samples/tgidemo.c/ and <tt/samples/mandelbrot.c/.
+<tt>samples/tgidemo.c</tt> and <tt>samples/mandelbrot.c</tt>.
 </abstract>
 
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