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.
5. 1988-89
12/11/88 - Terry Butcher headed past England international team-mate Chris Woods at Celtic Park as the home side won 3-1 Photo: SNS Group
6. 1987-88
17/10/87 - Butcher also beat Rangers' stand-in goalkeeper Graham Roberts in a match better remembered for the 'Goldilocks and Three Bears incident' Photo: SNS Group
7. 1978-79
13/12/78 - Celtic's Jim Casey, pictured left with team-mate Johannes Edvaldsson and Rangers' Alex MacDonald, converted past Roy Baines for Rangers' winner in extra-time at Hampden in the League Cup semi-final Photo: SNS Group
8. 1976-77
11/1/77 - Colin Jackson (right) had the decisive touch in a 1-0 win for Celtic in 1977, the third match of the New Year Photo: SNS Group