How to make 'appendix' appear in toc in Latex?

Question

How to make word \'appendix\' appear in the table of contents? Right now toc looks like this:

1 ......
2 ......
.
.
A .....

Answer 1

Based on @Will Robertson's answer, the code below defines the same thing but for chapter and also fixes the fact that chapter* does not add to the header when using the fancyhdr package.

With this in the preable all issues are resolved.

\makeatletter
\newcommand\appendix@chapter[1]{%
    \refstepcounter{chapter}%
    \def\app@ct{Appendix \@Alph\c@chapter: #1}
    \orig@chapter*{\app@ct}%
    \markboth{\MakeUppercase{\app@ct}}{\MakeUppercase{\app@ct}}
    \addcontentsline{toc}{chapter}{\app@ct}%
}
\let\orig@chapter\chapter
\g@addto@macro\appendix{\let\chapter\appendix@chapter}
\makeatother