We’re still waiting for Google to release an official version of Android L, but it looks like the company is already starting work on the next version of its mobile operating system. References to “M,” presumably a new version of Android, were spotted on Google’s Android Open Source Project (AOSP) forum on Monday, offering a taste of what the company has planned for the future.

The first mention of “M” appears in a discussion focused on “colored output” for Android’s logging system, Logcat, with one developer noting that this is an “experimental” feature meant for Android M. The second reference focuses on “protobuffers,” which Google uses to quickly transfer data between Android and its servers. Again, this update won’t be available until Android M hits the market either.

For now Android’s rumored “M” update sounds pretty technical, though we’re guessing Google will introduce some crowd-pleasing improvements as well. In the meantime we’re still waiting for Android L, which will include a sleek new look with Material Design, better battery life, multi-user phone support and more.

We’re expecting Android L to launch sometime next month alongside at least one new Nexus device. That means Android M could make its debut in mid-2015, though there’s no guarantee it won’t take longer depending on how big an update Google has planned.