Sweeten your afternoon tomorrow with a free Belgian waffle, courtesy of Zinneken's, the brand-new shop opening at 1154 Mass Ave.

The first 400 people to arrive at the shop after 5 p.m. on Thursday will get to taste the shop's signature sweet waffles for free.

After that, if you visit the store, located in the the former home of Arrow Street Crepes, you'll have to pay $4 (plus more for toppings) for your waffle, which co-founder Nhon T. Ma describes as "square and fluffy." Ma, who is originally from Belgium, said that the waffles are coated with melted sugar and will be available with toppings including Belgian chocolate, Nutella, and fruit when the shop has its grand opening on Friday.

The shop will be open from 7:30 a.m. to 12 a.m. daily, allowing waffle lovers to enjoy a treat at any mealtime. The menu will also feature coffee, espresso, tea, and hot chocolate.

Forget about dining hall food for dinner on Thursday—race over to the corner of Mass Ave and Arrow Street to welcome a new treat to Harvard Square.