\setlength\abovecaptionskip{5\p@}
\setlength\belowcaptionskip{0\p@}
\@ifundefined{captionfontsize}{%
  \def\captionfontsize{\small}}{}
\long\def\@makecaption#1#2{%
  \vskip\abovecaptionskip\captionfontsize
  \sbox\@tempboxa{\textbf{#1:} #2}%
  \ifdim \wd\@tempboxa >\hsize
    \textbf{#1:} #2\par
  \else
    \global \@minipagefalse
    \hb@xt@\hsize{\hfil\box\@tempboxa\hfil}%
  \fi
  \vskip\belowcaptionskip}