MK Dons consolidated their position at the top of the table with a hard-fought away win at Dagenham.
The home side threatened early on when Paul Benson's shot clipped the post, with Glen Southam also going close.
But Paul Ince's side took the lead when Dean Lewington's cross was headed home by central defender Drissa Diallo.
Jon Nurse headed onto the bar for the hosts before Dons' Lloyd Dyer blasted a penalty against the post after Jonathan Boardman brought down Colin Cameron.
Dag & Red: Roberts, Okuonghae, Boardman, Uddin, Griffiths, Southam, Huke, Sloma (Green 69), Strevens, Nurse, Benson (Moore 54).
Subs Not Used: Thompson, Cook, Tejan-Sie.
Booked: Uddin, Boardman.
Milton Keynes Dons: Gueret, Stirling, Diallo, O'Hanlon, Lewington, Wright (Hadfield 89), Cameron, Navarro, Dyer, Wilbraham (Broughton 46), Johnson (Knight 66).
Subs Not Used: Abbey, Gallen.
Booked: Gueret, Lewington, Cameron.
Goals: Diallo 24.
Ref: Darren Deadman (Cambridgeshire).