Despite criticism over his deep positioning, Kane has maintained a high scoring output for both club and country over several seasons.
"I think it's hard to argue about saying, 'yes, he scores goals in the box', but he's been scoring for five years now.
He's just never stopped scoring goals, let's be honest. He's doing something right," Waddle said.
Waddle concluded that the forward should maintain his current style of play ahead of England's World Cup campaign.
"We all say, 'we don't want you to come back into midfield, we don't want you to do this', but that's part of his locker and it's part of how he gets his goals, believe it or not.
I'd just say, what Harry Kane's doing at the minute in the last two, three, four seasons, just keep doing what you're doing, mate, because your goal record per game is absolutely phenomenal," Waddle said.
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England enters the tournament seeking its first major international trophy in 60 years.