They have kept just one clean-sheet in the last 12 games but Mignolet refused to blame uncertainties in defence.
He said: "All the players who are there are professional enough to deal with that.
"All the defenders here are very organised, motivated and concentrated.
"We need to do a job. It doesn't matter as a keeper who is in front of me.
"I work day in, day out with the lads. I know what they can do and it doesn't affect me whether the defenders change.
"You want to keep clean sheets - that is what I am there for - but you are just one part of the team."