The Belgian also took to Twitter to apologise for his clanger.
He said: "First of all I have to thank the fans for the reaction around the stadium afterwards.
"There are two things that can happen when you do things like that: The players, fans, can get behind you because they know what you have done for them in the past or they can get on your back. What happened was that they all got behind me.
"I really appreciate it and I thank them all for that. There's another game on Tuesday and that's what a goalkeeper's life is. You are only as good a goalkeeper as the last game you play.
"It doesn't stop the bleeding, no matter how I have done in the past. It is probably the worst mistake I will make. I have never made a big mistake like that before.
"You don't want things like that to happen. You know it can happen. But you can't do any more about it. You learn from it.
"I can't even say anything about it. That's what football is. Anything can happen in a split second. What happened is the question that will be in my head, spinning round. But I can't dwell on it.
"I was pleased with how the second half went. I didn't lose my confidence which is more important than what happened in the first half. There's plenty big games this year still to play."