Passport stamped with correct class (B2) at Port of entry, but doesn't have admit until date mentioned on the stamp. Is it ok?

I just landed in US on a B1/B2 Visa. The CBP officer at the Port of entry asked me how long I want to stay and I replied 180 days.

He then stamped my passport with today’s date and the right class B2. However I noticed that the admit until date is blank and the CBP officer didn’t write anything on it.

I’m not able to get my latest I-94 from the CBP website so I don’t know how long I can stay in the country. How do I get this fixed?

You can check with the CBP office at the airport terminal to see if there is a mistake.

There is a CBP office inside the terminal at each international airport to help with fixing i94 errors.