diff --git a/latex/paquets.sty b/latex/paquets.sty
index 036ca0f..e81e1f4 100644
--- a/latex/paquets.sty
+++ b/latex/paquets.sty
@@ -123,9 +123,13 @@ tex.print([[\addbibresource{]]..dirname(status["filename"])..[[commun.bib}]])
 %%% https://github.com/latex3/latex2e/issues/411#issuecomment-708434918
 % catoptions patch (no guarantee that will work):
 % must be applied before loading catoptions
+%%% https://tex.stackexchange.com/a/26229
+\newcommand*\@iflatexlater{\@ifl@t@r\fmtversion}
+\@iflatexlater{2020/10/01}{%
 \def\FIXcatoptions\endgroup#1\begingroup{#1}
 \AddToHook{package/after/catoptions}
-  {\gleftaddtocs\document{\FIXcatoptions}}
+  {\gleftaddtocs\document{\FIXcatoptions}}%
+}{}
 \RequirePackage[os=win]{menukeys}  %% charge catoptions
 \renewmenumacro{\keys}{shadowedangularkeys}
 \renewmenumacro{\directory}{hyphenatepathswithblackfolder}