Promotion hopefuls Rochdale returned to form with a narrow victory over Port Vale - their first win in four matches.
The cruicial goal came on 36 minutes when Chris Dagnall raced into the area and crossed from the byeline to Will Buckley, who had a simple tap-in.
Vale's John McCombe came close when he sent a header against the bar after Rob Taylor headed across goal.
And Vale almost levelled in the second half when Danny Glover raced through - only for Ciaran Toner to block.
Rochdale: Fielding, Ramsden, Holness, McArdle, Kennedy, Higginbotham (Thompson 37), Keltie, Toner, William Buckley (Rundle 90), Dagnall, Le Fondre (Madine 74).Subs Not Used: Wiseman, Newey.
Goals: William Buckley 36.
Port Vale: Martin, Stockley, McCombe, Collins, Edwards, Howland, Brammer (Richman 64), Marshall, Taylor (Glover 76), Lawrie, Dodds.Subs Not Used: Lloyd-Weston, Griffith, Thompson.
Ref: Andy Haines (Tyne & Wear).