The Haliburton Highlands OPP is reminding boaters to drive carefully.

On Friday, the OPP were called to Kushog Lake in Algonquin Highlands.

This is because a boat hit a rock.

Constable Tim Negus says the driver lost control of the boat, and now has serious injuries.

The 37-year-old Oakville man is in a Toronto Hospital.

The OPP says to always wear safety equipment while operating a boat.