Protesters in Canada may get into trouble for wearing the Guy Fawkes masks they’re known for if a protest escalates to a riot. That’s because Canada’s House of Commons last week approved a bill that bans people from hiding their faces during riots.

The bill was championed by a lawmaker who said it was a response to last year’s Stanley Cup riots in Vancouver, during which often-masked vandals smashed and lit fire to the city after their professional hockey team lost to the Boston Bruins, reports the security firm Sophos .

While the bill doesn’t apply to peaceful demonstrations, anyone convicted of covering his or her face during a riot or unlawful assembly could get up to 10 years in prison.

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