Problem with \listofchanges and document class amsart

Using the MWE below I get the error message:

! Undefined control sequence.
<argument> \equal 
             {\Changes@loc@style }{list}

\documentclass{amsart}

\usepackage[draft]{changes}
\definechangesauthor[color=orange]{JFK}

\begin{document}

test \added[id=JFK,comment=test2]{test comment}
\listofchanges

\end{document}

I discussed this issue on StackExchange and it seems that the problem is the usage of \ifthenelse inside the \section* command (see the next MWE)

\documentclass{amsart}
%\documentclass{article}
\usepackage{xifthen}% used by changes.sty
\def\test{test}
\begin{document}
\section*{
   \ifthenelse{\equal{\test}{test}}{it says test}{nope}
}
\end{document}

Thanks for any help with this.