Aberdeen slipped two points behind leaders Celtic as Kilmarnock deservedly shared the points at Pittodrie.
It looked to be plain sailing for the Dons when Graeme Shinnie set up Stevie May to fire them ahead from close range after only 10 minutes.
Killie boss Lee McCulloch changed from three at the back to four and Jordan Jones’ deflected drive off Kari Arnason gave them a deserved equaliser.
It ended the Dons’ run of 13 successive league wins over the visitors.
And it denied Derek McInnes’ side a fourth straight home win.
Kilmarnock have now gone seven games without a win and are bottom of the Premiership.