Forgot to list my intended major as an activity I do on my common app

I intend to major in Computer Science, but it has just occurred to me that I never explicitly listed “computer science” or “programming” as an activity I do in the “activities/extracurriculars” section of the common app. It does include computer science related teams/groups/activities I’m a part of though, and even a quick glance at my essays get the point across that I do like computer science and do it in my free time.

Does it matter if I explicitly listed my intended major as an activity I do, if it clearly is?

Shouldn’t matter.

Concurring with @sherpa. That should not be an issue for you when your application is under review at all.