Wasps flanker George Smith has been cleared of kneeing Gloucester's James Hook during Saturday's Aviva Premiership match.
An RFU disciplinary panel met on Wednesday at a London hotel and dismissed the citing against the 35-year-old former Australia openside.
Smith was charged with striking Hook on the side of the head with his knee in the second half at Kingsholm, where Wasps lost 13-10.
A statement from the RFU said: " George Smith of Wasps appeared before an RFU disciplinary panel this evening at the Bloomsbury Holiday Inn, charged with striking an opponent contrary to Law 10.4(a).
"Smith was cited following last weekend's Aviva Premiership match between Wasps and Gloucester for allegedly striking James Hook in the side of the head with his knee in the second half of the game.
"The case was dismissed. Smith is free to play again immediately."
Smith has been outstanding for Wasps this season, leading the team in the absence of James Haskell and Matt Mullan, and was named Premiership player of the month for February.
He has also been conducting coaching sessions on the breakdown for England, who are coached by his former Wallabies boss Eddie Jones.