Empty sections not showing up in Beamer ToC

I am going to use Beamer as a lecture tool, and planned on each lecture being represented by a section in Beamer. So even though we’re not at lecture 2, a section would show what it will be about.

However, the Beamer table of contents seem to be too smart for its own good, and does not show sections that don’t have slides following them.

Here’s a MWE:

documentclass{beamer}

begin{document}

section{Table of Contents}

begin{frame}{Table of Contents}
    tableofcontents
end{frame}

section{A real section}

begin{frame}{A real frame}
    This is a frame
end{frame}

section{An empty section}

section{Another real section}
begin{frame}{Another real frame}
    This is also a frame
end{frame}

section{Another empty section}

end{document}

And here is the ToC you then get:

As you can see, the last section does not appear in the ToC.
One can add the sections by using addcontentsline etc but getting the formatting to fit your beamer theme is a hassle. I feel like there should be an easier way to tell beamer to also include the sections that have no slides to the table of contents.

Also tried adding an invisible slide to the bottom, but was again outsmarted by Beamer, who figured out this slide didn’t exist, and therefore didn’t add the section to the ToC.