diff --git a/bookmark.dtx b/bookmark.dtx
index da2c324..014f326 100644
--- a/bookmark.dtx
+++ b/bookmark.dtx
@@ -727,12 +727,14 @@
% \paragraph{Some helper commands}
% Replaces some commands from ltxcmds:
%
+% \begin{macrocode}
\ExplSyntaxOn
\let\BKM@LocalAppendToMacro\tl_put_right:Nn
\let\BKM@GlobalAppendToMacro\tl_gput_right:Nn
\ExplSyntaxOff
\def\BKM@space{ }
\long\def\BKM@ReturnAfterFi#1\fi{\fi#1}
+% \end{macrocode}
%
% \paragraph{Packages.}
%