SAN ANTONIO -

Whataburger is celebrating the 100th birthday of its founder with $1 burgers on Tuesday.

Founder Harmon Dobson would have been 100 on Oct. 8.

Customers can claim the limited offer through visiting the Whataburger Facebook fan page and redeem it at any Whataburger location on Tuesday between 5 p.m. and 8 p.m.

The offer is only available to customers who dine in. No additional purchase is required to receive an original Whataburger for $1 plus tax.