Double-Spacing an ACM Proceedings Article in LaTeX

latexspacingtemplatestex

I am using the acm LaTeX template and I have trouble making my paper double spaced.

My LaTeX document looks like the following:

\documentclass{acm_proc_article-sp}
\usepackage{setspace}
\doublespacing
\begin{document}
...
\end{document}

When I compile the above document using pdflatex, I get the following error message on the line that I use the command \doublespacing:

Missing number, treated as zero \doublespacing

Best Solution

\linespread{2} should work. Doesn't need any packages, as far as I can tell, and you could change it to 1.9-spacing or 2.1-spacing, if you felt like it...