diff --git a/Doc/tut/tut.tex b/Doc/tut/tut.tex
index 893cd693417..eeca1d2b84e 100644
--- a/Doc/tut/tut.tex
+++ b/Doc/tut/tut.tex
@@ -4479,6 +4479,7 @@ Be sure to use the \samp{import os} style instead of
 shadowing the builtin \function{open()} function which operates much
 differently.
 
+\bifuncindex{help}
 The builtin \function{dir()} and \function{help()} functions are useful
 as interactive aids for working with large modules like \module{os}: