$httpaccept = isset($_SERVER['HTTP_ACCEPT']) ? $_SERVER['HTTP_ACCEPT'] : null;
- $rdftype = wfNegotiateType(wfAcceptToPrefs($httpaccept, wfAcceptToPrefs(RDF_TYPE_PREFS));
+ $rdftype = wfNegotiateType(wfAcceptToPrefs($httpaccept), wfAcceptToPrefs(RDF_TYPE_PREFS));
if (!$rdftype) {
wfHttpError(406, "Not Acceptable", wfMsg("notacceptable"));