Using a footnote in the full name of an acronym

Using a footnote in the full name of an acronym

I would like to use a footnote in the full name of an acronym. Here is the
minimal (not) working example:
\documentclass{report}
\usepackage{acronym}
\usepackage{footnote}
\begin{document}
\begin{acronym}[ABC]
\acro{ABC}{Alphabet\footnote{this does not work}}
\end{acronym}
The \ac{ABC}\footnote{this works}.
\end{document}
I'm already using the acronym package to link acronyms with publications:
\acro{ABC}{Alphabet\cite{publication2013abc}}
But sometimes there is either no publication or a web site is more
appropriate:
\acro{ABC}{Alphabet\footnote{\url{http://website-for-abc.example.org}}}
Any hints?
Best regards, Alex