The critics were unhappy with Depp's sign-language skills in the video that he recorded with Natalie Portman.
"I had to learn sign language and I was only copying what the guy showed me, so track him down," a website quoted the 48-year-old as saying.
"Apparently, instead of 'love' I might have said 'murder," he added. Depp also says he feels that sign language is interpretive.
"But it was a gas - sign language is apparently very interpretive. It's all kind of different," he said.