But the unfortunate Celtic captain is not the first, nor will be the last, to turn into his own net during one of the biggest games of the season.
We took a look back on the last ten own goals scored in Old Firm encounters – a flashback that stretches all the way back to halcyon days for both sides in the early-1970s.
9. 1972-73
06/01/73 - Dave Smith's own goal is also credited to Dixie Deans in some records, but Jack Wallace's Rangers ran out 2-1 winners thanks to Alfie Conn's last minute decider Photo: SNS Group
10. 1973-74
18/08/73 - Billy McNeil was a veteran of Old Firm encounters over his decades of service with Celtic, and he turned into his own net late on in a League Cup sectional match - but Celtic still won 2-1. Photo: SNS Group