Newcastle Jets goalkeeper Ben Kennedy understands he needs to get rid of the mistakes he has been making in recent times.

The 22-year old again gave away a penalty on Friday night against Perth Glory as the Jets sunk to a third loss in a row and knows he needs to eradicate these errors that are beginning to cost the club important points.

"As a goalkeeper one mistake leads to a goal most of the time," he said.

"That is what has happened the past two weeks. Obviously it is disappointing for me and the team.

"I have led to us losing three points, but I just have to put it behind me, get my confidence back and start playing well again.

"I have been waiting for a long time (for the No.1 spot) and felt up until the past two weeks I had been doing pretty well.

"Even Sydney last week, I thought I was OK, barring the penalty.