CHICAGO — Attorneys for a transgender man who challenged an Indiana law that prevents him from changing his first name to a male name have urged an appeals court to reinstate his lawsuit.

A federal judge dismissed the man’s lawsuit in March, finding he hadn’t established his legal standing to sue Indiana. The man appealed that ruling.

One of his attorneys asked the 7th Circuit Court of Appeals in Chicago on Wednesday to reverse that decision, arguing the judge erred in dismissing his complaint.

Attorneys for Indiana urged the appeals court to affirm the lawsuit’s dismissal.

The man was born in Mexico and is challenging a law that requires him to show proof of citizenship to change his name. He says that law is unconstitutional.