The 31-year-old drew level with former Lions legend Teddy Sheringham as his strike at the Banks' Stadium helped keep his side among the pace-setters in League One.
Harris said afterwards: "Teddy Sheringham. What a player and what a person and what a proud achievement for me to be on a par with him.
"I'm very proud to be part of the club and part of the history of the club and I just want to go on.
"I'd like to thank the fans who've backed me and the goal was special for the finish and for the record."