Is it wrong to tell a co-worker that he smells bad?

I work in the food Industry…At a somewhat upscale restaurant. One of my fellow employees smells like he hasn’t taken a bath in 6 months…I mean even after he walks past me the smell lingers longer than I can hold my breath. Am I wrong to want to tell him? What should I do? I don’t want to be mean..How would you handle it? Is it wrong to tell a co-worker that his scent is making me want to vomit?