This time last year, the 27-year-old already had five goals to his name, but has yet to get off the mark this season after coming back from an injury suffered last April.
The reigning Hammer of the Year, whose hamstring complaint ruled him out for four months, has scored just once in his last 17 appearances in all competitions.
"It's been a bit of a rusty start - I was out for four months, but don't worry, the goals are coming! I'll catch up," Antonio told Sky Sports News.
"I love attacking. I love scoring goals - it's why I play football, but [goal droughts] are part of parcel of the game. I will be ready and I will start scoring soon."
Slaven Bilic's charges have taken just four points from their first five Premier League games, but are unbeaten in their last two matches.