Alex Revell's header earned Rotherham victory over in-form AFC Wimbledon and moved them to within two points of the League Two automatic promotion places.
Revell netted after Kari Arnason flicked on Lionel Ainsworth's corner to earn a first win in four games.
The Millers dominated against a massed defence and keeper John Sullivan denied Lee Frecklington and Claude Davis while Johnny Mullins also went close.
Harry Pell had the away side's best chance after half-time.
But Rotherham fully deserved their win against a side who had won four of their last five games to steer away from relegation trouble.
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Rotherham United manager Steve Evans told BBC Radio Sheffield:
"We've watched game after game here, where if it was a boxing match they'd throw in the towel in.
"It would be stopped because we had so much possession, so much domination.
"We said to the players at half-time if we end up drawing nil nil, but trying to still play the right way, then we'll live with it.
"But we're delighted obviously to get three points."
Rotherham United 01 Shearer 03 Davis 06 Mullins 20 Morgan 37 Skarz Booked 04 Arnason 19 Noble (Ainsworth - 73' ) 27 Frecklington 35 Kearns (Agard - 87' ) 09 Revell 17 Nardiello (Odejayi - 85' ) Substitutes 21 Warrington 33 Ridehalgh 07 Ainsworth 10 O'Connor 15 Pringle 16 Odejayi 22 Agard AFC Wimbledon 22 Sullivan 05 Balkestein 06 Mitchell-King 39 Bennett 44 Hussey 11 L Moore Booked 12 Pell 23 Yussuff (Sainte-Luce - 56' ) 31 Meades 10 Midson 28 Alexander (Darco - 56' ) Substitutes 33 Jaimez-Ruiz 03 Cummings 25 Youga 29 Antwi 07 Long 16 Sainte-Luce 14 Darco
Ref: Mark Heywood