It depends. You may be able to claim him as an "other dependent", assuming he has met all the tests, from: Rules for Claiming Dependents on Taxes:
- Do they live with you? Your relative must live with you all year as a member of your household or be on the list of “relatives who do not live with you” in Publication 501.
- Do they make less than $5,050 in 2024 ($5,200 for 2025)? Your relative can't have a gross income of more than $5,050 in 2024 and be claimed by you as a dependent. This threshold increases to $5,200 for 2025. Certain income is excluded from this requirement such as all or part of Social Security benefits.
- Do you financially support them? You must provide more than half of your relative's total support for the year.