Horry County Fire Rescue was called to a home on M.W. Stroud Road, off Highway 917 in the Ketchuptown community, about 1:50 p.m. Thursday.
Firefighters found a fire on the front steps of the house and a small fire inside on a mattress, which they were able to knock down quickly.
A fire investigator was called to the home to try to figure out if the fire was intentionally set.
The house was vacant.