The French ministry of culture will allow cinemas to show the controversial film "Salafistes", which features interviews with North African jihadists, but have banned it for anyone under 18 in a rare move for a documentary in France.
The over-18 rating is normally only given to pornographic or ultra-violent films.
According to the filmmakers, the move will "kill the film", as it effectively bans it from being aired on public TV and means cinemas will be reluctant to show it.