Both are available to play after the game against Reading at the Stadium of Light was postponed over the weekend.
"The Morecambe game takes on a lot of significance now, although I thought it did anyway beforehand," O'Neill told safc.com.
"After Reading we might have made one or two changes. Now we'll have a little look and see what we're going to do.
"We will go pretty strongly into the game because obviously we want to get through."