Help with Select Statement

I'm trying to format the output of and keep getting an error: Conversion failed when converting the varchar value '(ok)' to data type int.

Here is my code:
SELECT          SUM(VOID_COUNT) + '(ok)'  AS 'Voids'
FROM            SALES_SUMMARY
WHERE        (STOREID = 14) AND (check_file_date = '7/6/2009')

I'm trying to produce this output:
Voids
12 (ok)

Any ideas here?