The Palace striker gave his side the lead in the first half with what was only his second goal of the season.
Despite his barren run in front of goal, the Belgian international was confident he would find the back of the net against the Hammers.
"The first half we didn't play that good, but managed to score first," he told Sky Sports.
"The second half we tried to have more composure, but couldn't find the ball in the box.
"I always had the feeling I was close to scoring, but the main thing was getting points and that's what we've done in the past few weeks.
"On Sunday, it's another big game against Newcastle."