[Tex/LaTex] Removing appendix header after the end of appendix

Question

I would like to insert my personal acknowledgements by means of a \chapter*{acknowledgements} command after the end of appendix.
I created the appendix in the usual manner, with \appendix or \begin{appendices}-\end{appendices} but, since my acknowledgements are spread along three pages, on the third one of ack. chapter there is the appendix header on the top displaying the appendix title.
How can I remove it? It seems that TeX thinks that acknowledgements chapter still is an appendix chapter.

\documentclass[a4paper,12pt,openright,twoside]{book}
\usepackage[toc,page]{appendix}

Answer 1

immediately following the line

\chapter*{acknowledgements}

insert this command:

\markboth{Acknowledgements}{Acknowledgements}

you may have to input this in all caps to match the running head style for the rest of your document.

some document classes don't make proper running heads from the titles when entered with \chapter*, and it appears that you're using one of them.