The former Manchester United star was just off target with his effort just six minutes into the preseason friendly on the south coast of England.
However, as Andy Crick of The Sun reported, the Portugal international's right-foot drive flew sharply beyond the goal of Bournemouth goalkeeper Darryl Flahavan and crashed into the stand where young Charlie was seated with his dad, Lee.
The youngster says his father ducked to avoid the flight of the ball, and instead it struck his son and broke his wrist in two places.
Despite the pain, Charlie refused to miss the rest of the match, which Carlo Ancelotti's team won 6-0 with Ronaldo scoring twice, and sat in agony for the remaining 84 minutes as Sami Khedira, Gonzalo Higuain, Angel Di Maria and Casemiro added further goals for the Spanish club.
The boy went to hospital after the match, where doctors found his wrist had been broken in two places by the powerful Ronaldo strike.
To ease the pain of his injury, Charlie was presented with a signed Real Madrid shirt by Bournemouth, while the Bernabeu club have also promised to give him a memento, according to The Sun article.
Charlie was also given a ball signed by the Bournemouth players, but it is fair to say that having your wrist broken by Cristiano Ronaldo will dwarf such a kind gesture when the youngster regales his friends with the tale.