diff --git a/Doc/texinputs/python.sty b/Doc/texinputs/python.sty
index 3f0370ac242..ce041b8c735 100644
--- a/Doc/texinputs/python.sty
+++ b/Doc/texinputs/python.sty
@@ -809,6 +809,8 @@
 \newcommand{\rfc}[1]{RFC #1\index{RFC!RFC #1}}
 \newcommand{\program}[1]{\strong{#1}}
 \newcommand{\programopt}[1]{\strong{#1}}
+% Note that \longprogramopt provides the '--'!
+\newcommand{\longprogramopt}[1]{\strong{-{}-#1}}
 
 % cited titles:  \citetitle{Title of Work}
 %       online:  \citetitle[url-to-resource]{Title of Work}