Make . match newlines too?

[Mike Schiraldi <1075985781@xxxxxxxxxxxxx>]

I have an entry in my .muttrc to colorize in red any messages that
SpamAssassin's Bayesian filter identifies as spam with 99% certainty:

color index red black '~hX-Spam-Status:.*BAYES_99'

However, it doesn't work when the BAYES_99 is on another line, like this:

X-Spam-Status: Yes, hits=18.8 required=5.0 tests=ADDR_NUMS_AT_BIGSITE,
        BAYES_99,CLICK_BELOW_CAPS,FORGED_YAHOO_RCVD,FROM_ENDS_IN_NUMS,
        HTML_70_80,HTML_FONTCOLOR_RED,HTML_FONT_BIG,HTML_LINK_CLICK_CAPS,
        HTML_LINK_CLICK_HERE,HTML_MESSAGE,MIME_HTML_NO_CHARSET,MIME_HTML_ONLY,
        SUBJ_ALL_CAPS autolearn=no version=2.61

Is there a regexp i can write that will match such lines? Or, by any chance,
has the behavior of ~h patterns been changed to match across all lines of a
given header since the last time i upgraded? (I'm using 1.5.4i).

Thanks