Walmart is reportedly doing away with at least some self-checkout lanes in two states.

Daily Express US reported some Walmart stores in Maine and Massachusetts are set to remove self-checkout technology in stores due to concerns over revenue and theft. The move would come after the nation’s largest retailer removed self-checkout machines at a handful of New Mexico locations earlier this year.

At the time of the New Mexico changes, Walmart declined to say whether similar plans were in store for other U.S. locations but confirmed to Business Insider the removal would not be widespread.

Self-service machines were introduced during the 1980s in an effort to lower labor expenses but have become increasingly unpopular among shoppers. Retailers have also recognized that self-checkout lanes can lead to greater “shrink,” or losses due to things like customer errors or shoplifting.

One study showed companies with self-checkout lanes had a loss rate of about 4%, more than double the industry average, CBS News reported.

On its website, Walmart touts its “hosted checkouts,” or self-checkout with an employee available for assistance.

“Over the past few years, we have rolled out new Hosted Checkouts in a number of our stores. Our associates working in the Customer Host role can show customers to available registers, help them through the checkout process and answer any questions they may have. This new checkout process is designed to help customers complete their shopping even faster,” Walmart’s website noted.

“If you prefer checking out with a cashier, we will continue to have that option available for customers who prefer that method. As customers continue to change the way they shop, we’ll keep looking for new ways to offer choice while saving you time and money.”