A 78-year-old man has been charged following an alleged incident during a camping trip dating back 40 years.

Sarnia police have charged Joseph Albert Firlotte with indecent assault on a female.

They say a female reported that she was sexually assaulted while on a camping trip in Lambton County  in 1977.

Police began the investigation last month.

Firlotte is to appear in court on August 8.

No other details have been provided by police.