President Barack Obama has done his civic duty and filled out his Census form, and in doing so confirmed that he is, indeed, the first African-American U.S. president.

Obama checked African-American on the form when he filled it out, White House spokesman Robert Gibbs said. And he did it without giving it a great deal of thought.

“I think he just checked it,” Gibbs told reporters during a briefing in his office at the White House on Friday.

The United States conducts a Census every 10 years, asking every household in the country to fill out a 10-question form. Participants are asked to provide contact information and to check whatever box or boxes they believe best describe their race. There is no box for mixed race. Obama, the son of a white U.S.-born mother and black Kenyan father, could have checked the box for white, the one for  ”black, African Am. or negro” or both.

Picture Credit: U.S. President Barack Obama speaks about jobs and the economy during a visit to Celgard Inc. in Charlotte, North Carolina, April 2, 2010. REUTERS/Kevin Lamarque