The Washington Post was reporting Saturday evening that Rep. Mark Kirk, the Republican Senate nominee in Illinois, inaccurately claimed in his official campaign biography that he had received the U.S. Navy’s Intelligence Officer of the Year award.

Kirk’s campaign changed the entry Thursday evening.

Alexi Giannoulias, the Democratic Senate nominee whose own campaign has been racked by headlines about his family’s failing bank, had prodded the media to look into Kirk’s military record, the Post reported.

According to the newspaper, Kirk disclosed on his campaign blog that “upon a recent review of my records, I found that an award listed in my official biography was misidentified” because the award that he listed was given to his unit, not to him individually.

Kirk’s disclosure comes less than two weeks after another highly touted Senate candidate, Connecticut Attorney General Richard Blumenthal (D), was forced to admit that he had occasionally misspoken about his military service during the Vietnam War era.

The Illinois Senate race to fill the seat formerly held by President Barack Obama is close. Illinois has been a Democratic stronghold in recent election cycles, but Giannoulias’ family’s troubles, along with Kirk’s moderate voting record, have put the seat into play.