The first round of Android ar devices have only just started shipping. But any early adopter who straps on an G tch or Samsung Gear ve to their wrist in the coming days may have a problem installing paid apps designed for Android ar.

oblems with ay’s approach to copy protection are making it impossible to install paid apps on Android ar smartwatches, according to Android lice.

In 2012, introduced App Encryption to ay Store apps to make it harder for hackers to crack then freely distribute any paid apps—but now that encryption has backfired on Android ar.

To get a smartwatch app onto your device you currently have to download a companion app to your smartphone. Then the phone app automatically checks for a paired watch installs the app on the watch via Bluetooth.

But the install process has to extract the encryption key for a paid app to move from the smartphone to the watch, which it currently can’t do, Android lice reports. Ultimately, the install process fails Android ar owners are left to figure out why a purchased ar app isn’t showing up on their shiny new watch.

To get around this problem, some developers are offering a free app install with in-app purchases, thus removing the app encryption problem.

will probably fix this issue pretty quickly since the company is hoping ar will be the biggest platform in the exping wearables market. Until a fix does appear, however, know that paid apps for ar are best avoided for now. And if you see an uptick of in-app purchases for ar, keep in mind these apps aren’t necessarily trying to fool you into buying something, but simply working around an existing issue.