diff --git a/Doc/texinputs/python.sty b/Doc/texinputs/python.sty
index 1608fa1..3d19e46 100644
--- a/Doc/texinputs/python.sty
+++ b/Doc/texinputs/python.sty
@@ -381,7 +381,7 @@
   \renewcommand{\@thisclass}{#1}%
   \begin{fulllineitems}%
     \item[\code{\bfcode{#1}(\varvars{#2})}]%
-    \ttindex{#1}%
+    \withsubitem{(class in \@thismodule)}{\ttindex{#1}}%
     \def\baseclasses##1{}%
 }{\end{fulllineitems}}