Rep. Steve Stockman (R-Tex.) said Friday that he is under investigation by the House Ethics Committee due to a reporting error he made with the Federal Election Commission.

Stockman was elected to the House in 2012 and previously served in the House from 1995-1997. He is stepping down after this year after losing a primary challenge against Sen. John Cornyn (R-Tex.) this Spring.

In a statement Friday, Stockman said that the ethics panel had extended the time for its review of an Office of Congressional Ethics referral concerning a reporting error his campaign made in an FEC report. The FEC reporting error was committed more than a year ago by an accountant who was a campaign volunteer, his statement said.

“My office is aware of and is cooperating fully with the Ethics Committee’s preliminary inquiry into an FEC reporting error," Stockman said. "I thus join 34 of my colleagues who have also been the subject of an O.C.E. review in the 113th Congress, and am confident the Ethics Committee will ultimately dismiss the matter after it completes a careful review."

The OCE was established in 2008 and is a clearinghouse for accusations of wrongdoing against lawmakers. It regularly refers accusations to the Ethics Committee, which then decides whether to pursue a more formal investigation.