diff --git a/Doc/texinputs/python.sty b/Doc/texinputs/python.sty
index 904e971d39f..8f957640b5d 100644
--- a/Doc/texinputs/python.sty
+++ b/Doc/texinputs/python.sty
@@ -257,7 +257,7 @@
   \setindexsubitem{(in module #1)}%
   \index{#1@{\py@idxcode{#1}} (#2module)|textbf}%
   \ifpy@UseModuleIndex%
-    \write\modindexfile{\protect\indexentry{#1@{\tt #1}}{\thepage}}%
+    \write\modindexfile{\protect\indexentry{#1@{\texttt {#1}}}{\thepage}}%
   \fi%
 }