Rep. Mark KirkMark Steven KirkHigh stakes as Trump heads to Hill Five things to watch for at Trump-Senate GOP meeting Giffords, Scalise highlight party differences on guns MORE, the Republican candidate for Senate in Illinois, said he didn't win the U.S. Navy Intelligence Officer of the Year award as he earlier claimed but a different award.

Kirk's official biography on his campaign website had said was named the Intelligence Officer of the Year in 1999 for his service during NATO and U.S. military operations in Kosovo. While speaking in March 2002 on counterterrorism operations during a Congressional hearing, Kirk said he was the "Navy's Intelligence Officer of the Year in 1998." (See the video below.)

Kirk admitted the error in a campaign blog post and changed his biography Thursday to say that he won the Vice Admiral Rufus L. Taylor Award for given to outstanding Naval Intelligence officers.

"It was one of the honors of my life to lead the Intelligence Division Electronic Attack Wing Aviano, Italy -- and I am very proud of this award," he wrote on his campaign blog. "My official biography will reflect this updated information."

Kirk also posted fitness reports from his service in Kosovo in which a senior officer praised him as "head and shoulders above any other intelligence officer" he had met.

Kirk is running against Illinois treasurer Alexi Giannoulias (D) to fill the Senate seat once held by President Barack ObamaBarack Hussein ObamaOvernight Energy: Dems ask Pruitt to justify first-class travel | Obama EPA chief says reg rollback won't stand | Ex-adviser expects Trump to eventually rejoin Paris accord Overnight Regulation: Trump to take steps to ban bump stocks | Trump eases rules on insurance sold outside of ObamaCare | FCC to officially rescind net neutrality Thursday | Obama EPA chief: Reg rollback won't stand Ex-US ambassador: Mueller is the one who is tough on Russia MORE.

A representative for Giannoulias had complained about Kirk's military award to the Washington Post, sparking inquiries into the matter, the Post said Saturday.

Kirk's campaign, which has sought to tie Giannoulias to the collapse of his family's bank, Broadway Bank, said Giannoulias had no standing to question Kirk's record.

“Alexi Giannoulias is a failed mob banker whose reckless lending practices cost the FDIC $394 million when they closed his family bank and he cost Illinois families tens of millions in losses from the state’s college savings fund," said Eric Elk, a Kirk spokesman. "Giannoulias is in no position to question the character or integrity of a distinguished Naval Officer.”

This post was updated at 1:40 p.m. Sunday