Ian Miller's injury-time header handed Darlington the advantage in their League two play-off semi-final.

Rochdale's Chris Dagnall curled a shot against the bar before Jason Kennedy gave the hosts the lead with an exquisite shot into the top corner.

The visitors pressed after the break and got their reward when Dagnall equalised with a deflected effort.

But substitute Miller rose highest to head in Neil Wainwright's free-kick and snatch victory in the dying moments.

Darlington: Stockdale, Wiseman, Foster, White (Miller 87), Purdie, Ravenhill, Joachim, Parker (Ndumbu-Nsungu 79), Kennedy, Cummins, Wright (Wainwright 64).
Subs Not Used: Kazimierczak, Keltie.

Goals: Kennedy 28, Miller 90.

Rochdale: Lee, Ramsden, D'Laryea (Holness 66), McArdle, Kennedy, Higginbotham, Perkins, Jones, Rundle (Muirhead 74), Dagnall (Le Fondre 82), Howe.
Subs Not Used: Thompson, Basham.

Booked: Jones.

Goals: Dagnall 70.

Att: 8,057

Ref: Paul Armstrong (Berkshire).