[Tex/LaTex] Pagestyle plain. No page number on last page of chapter

header-footerpage-numbering

I am using plain pagestyle. Last page of every chapter doesn't have page number.
This is my master page:

\documentclass[a4paper,onecolumn,oneside,11pt,wide,floatssmall]{mwrep}
\usepackage{bookman}
\usepackage{geometry}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{listings}
\usepackage{caption}
\usepackage{subcaption}
\usepackage{float}
\pagestyle{plain}

\usepackage[sort, compress]{cite}

\usepackage{pgfplots}
\usepackage[pdftex, bookmarks=false]{hyperref}

\begin{document}

\pagenumbering{roman}
\renewcommand{\baselinestretch}{1.0}
\raggedbottom
\input {title}

\tableofcontents

\newpage
\pagenumbering{arabic}
\setcounter{page}{1}

\input {chap_a}
\input {chap_b}

\end{document}

%%% Local Variables: 
%%% mode: latex
%%% TeX-master: t
%%% End:

Files: chap_a, chap_b contains text. Chapter chap_a and chap_b are two A4 pages long. Second page of chap_a doesn't have page number. chap_a.tex and chap_b.tex files are identical: 

\chapter {WSS}
\label{chap:wss}
\section{WSS}
aa bb ...
aa bb

\subsection{BBAA}
bb aa ...
bb aa

%%% Local Variables: 
%%% mode: latex
%%% TeX-master: "main"
%%% End:

How can I put page number on these pages?

Hint:
When I change pagestyle: pagestyle{headings} instead of pagestyle{plain} I have page numbers on every page in header except first page in every chapter, which doesn't have page number in footer (I read that it should have).

Best Answer

Add the following lines 

\makeatletter
\def\ps@plain{%
  \let\@mkboth\@gobbletwo
  \let\ps@normal\hf@plain
  \let\ps@opening\hf@plain
  \let\ps@closing\hf@plain
  \let\ps@blank\hf@empty
  \ps@normal}
\makeatother

just before 

\pagestyle{plain}

and the problem is solved.

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