Activision says it has “disabled a workaround to a detection system” in Modern Warfare III and Call of Duty: Warzone that led to legitimate players getting banned by the Ricochet anti-cheat system. The company says the problem “impacted a small number of legitimate player accounts,” and all accounts affected were restored.

Online shooters can get contentious, so it’s no surprise that they’re filled with cheaters and regular players whose behaviors get them banned. But some hackers were able to exploit Call of Duty‘s automated anti-cheating system to get innocent players banned,