Rochdale have extended the loan of Blackburn Rovers' England Under-19 international defender Jack O'Connell until the end of the season.
The League Two promotion-chasers have also agreed a similar deal with Preston North End striker Graham Cummins.
O'Connell, 19, has been a regular, having missed just three of Dale's games this season.
Cummins, 26, has netted three times in 19 appearances since arriving from Deepdale in September.
Keith Hill's side currently lie fourth in League Two, just one point off top spot going into the New Year's Day trip to Scunthorpe.