How do I apply filters or limit the rows on my report using a Date field in SQL report builder 3.0?

I have a status of completed and a date field in the dataset. The date field is either empty or contains a date. All 2015 dates are holding dates.

So how can I limit the report to only pull completed status with an empty date or a holding date?

I have not been able to set an OR option on a date field filter and if I add two filters on the date column one for empty one for > 12/31/2014 then it treats it as an "and" and pulls nothing from the list I have in sharepoint.

any help will be appreciated.