The new version of Samsung’s Gear smartwatch will run on Tizen, not Google’s Android operating system, the latest attempt by the South Korean electronics giant to develop more of its own software and services, according to three people familiar with the situation.

Samsung will unveil the updated Gear watch, and a new HTML5 version of the Tizen operating system, at an event at the Mobile World Congress later this month in Barcelona, Spain, the people said.

If true, this is the first of Samsung’s devices to use the new operating system, but it won’t be the last. Google should be very worried.