Returning function results...

How do I return a record to a function?
When I try to add the function below to my database I get this error:
psql:/path/:825: NOTICE: ProcedureCreate: type 'record' is not yet defined

CREATE FUNCTION get_last_respondent(INT4)
RETURNS RECORD
AS 'DECLARE
int_issue_id_var ALIAS FOR $1;
rec_person RECORD;

BEGIN
SELECT h.who, iss.id AS issue, h.id AS histid
INTO rec_person
FROM history h, issues iss
WHERE iss.id = int_issue_id_var
AND iss.id = h.issue
AND h.h_type = 3
AND h.who <> iss.submitter
ORDER BY histid DESC;

RETURN rec_person;
END;'
LANGUAGE 'plpgsql';

Thanks, Bob