An awareness of 16th note or (semiquaver) subdivisions will help you nail this one. Start by playing four muted 16th notes, accenting the first, using string up and down right hand strums. Then start repeating the pattern, its much easier once you have an understanding of the subdivisions to feel and hear the tune! Check out the video for a full tutorial.
If you're interested, you can check out Nile Rodgers' pretty comprehensive discography here!: