Had an interview with an oil company.  They asked if I had a relative working for a government agency.  I replied no.  After the thank you note was sent I realized that I had forgotten that my brother worked for the government.  I went back and corrected the answer on the online application after I was also asked in the interview and responded as No.  Should I call the hiring manager and explain the mistake?  The interview went well and the follow up response is said to be next week.  Leave it alone or call?