Sonos is finally getting ready to add Spotify to the list of music services its users can control with voice commands via Amazon’s Alexa assistant: The company has committed to enable full voice control for Spotify by December 21, according to an update to its support forums that was first spotted by a Reddit user.

Sonos officially unveiled its first speaker with integrated microphones for voice control at the beginning of last month. At the time, the company also opened up access to a beta test that allows owners of existing Sonos speakers to control these devices with a separate Amazon Echo.

However, Spotify was curiously absent from the list of supported music services for both announcements. Sonos One owners and Sonos owners with an Echo have been able to use voice commands to request songs, albums, playlists and other programming from Amazon Music, Pandora, iHeartRadio, TuneIn Radio and SiriusXM — but not from Spotify, the world’s most popular subscription music service.

Granted, there has always been the option to launch Spotify streams with the Sonos mobile app. And a year ago, Spotify also added the ability to control Sonos speakers directly from its own app. But many consumers who bought the Sonos One for its voice capabilities likely expected it to offer voice control for Spotify as well.

There’s no word on what caused the hold-up, or when Sonos will add voice control for additional music services. The company already announced that it plans to bring Google’s voice assistant to the Sonos One at some point in 2018, which should also come with voice control for Google’s own music services.