Amid supply chain constraints as a result of the coronavirus pandemic, Apple is limiting online iPhone orders.

According to CNBC, “Apple’s online store began limiting U.S. customers to two units of each iPhone model per person this week. Customers can still buy more than two iPhones in one order, but they would have to be different models — for instance, two iPhone 11s and two iPhone 11 Pros.

“The restriction applies to the iPhone 8, iPhone 8 Plus, iPhone XR, iPhone 11, iPhone 11 Pro, and iPhone 11 Max.” Apple is also limiting orders of the new iPad Pro the company announced on Wednesday.

The news is the latest indication the coronavirus has had a significant impact on Apple’s supply chain. The company previously announced it would miss its quarterly guidance as a result of the virus, while analysts believe the supply chain issues could persist and impact Apple’s 2021 earnings. Apple also warned its store personnel that warranty replacement iPhones were in short supply.

Apple taking the drastic step of limiting purchases is further evidence the company doesn’t see its supply chain catching up anytime soon.