Memoir header problem with \chapter*

Question

I'm using memoir, when I use \chapter* the header is copied from the previous section.

How can I fix that?

MWE:

\documentclass{memoir}

\usepackage{lipsum}
\setcounter{secnumdepth}{3}

\copypagestyle{ruledsmallhd}{ruled}
\makeevenhead{ruledsmallhd}{\footnotesize\scshape\leftmark}{}{}
\makeoddhead{ruledsmallhd}{}{}{\footnotesize\scshape\rightmark}
\makeheadrule{ruledsmallhd}{0px}{0px}

\begin{document}

\pagenumbering{roman}
\pagestyle{ruledsmallhd}

\cleardoublepage
\maxtocdepth{subsection}
\tableofcontents

\cleardoublepage
\chapter*{Introduction}
\addcontentsline{toc}{chapter}{Introduction}

\lipsum

\end{document}

Answer 1

There's no need of any special trick:

\documentclass{memoir}

\usepackage{lipsum}
\setcounter{secnumdepth}{3}

\copypagestyle{ruledsmallhd}{ruled}
\makeevenhead{ruledsmallhd}{\footnotesize\scshape\leftmark}{}{}
\makeoddhead{ruledsmallhd}{}{}{\footnotesize\scshape\rightmark}
\makeheadrule{ruledsmallhd}{0pt}{0pt}

\begin{document}
\frontmatter
\pagestyle{ruledsmallhd}

\cleardoublepage
\maxtocdepth{subsection}
\tableofcontents

\chapter{Introduction}

\lipsum

\mainmatter

\chapter{Let the fun begin}

\lipsum

\end{document}