-AC_ARG_ENABLE(html-doc, [ --enable-html-doc build HTML documentation [default=yes]], , enable_html_doc=yes)
-AC_ARG_ENABLE(ps-doc, [ --enable-ps-doc build PostScript documentation [default=yes]], , enable_ps_doc=yes)
+AC_ARG_ENABLE(html-doc, [ --enable-html-doc build HTML documentation [default=no]], , enable_html_doc=no)
+AC_ARG_ENABLE(ps-doc, [ --enable-ps-doc build PostScript documentation [default=no]], , enable_ps_doc=no)