Aaron Ramsey's winner at Rotherham sent Norwich City up to fourth in the Championship table.
Kenny McLean nodded the visitors ahead after a blocked Teemu Pukki shot sat up kindly for the midfielder to finish.
Rotherham were level for a minute when Ollie Rathbone struck early in the second half, only for Ramsey to immediately restore the Canaries' advantage.
Viktor Johansson made a fine save to deny Josh Sargent from adding to Norwich's lead, while Angus Gunn kept Tom Eaves out at the other end.
An excellent block from Canaries defender Max Aarons on Ben Wiles proved decisive as the Millers slumped to a third successive defeat.