Spireites have signed forward Caolan Lavery on loan from Championship side Sheffield Wednesday.
The 22 year-old joins the Spireites on an emergency loan deal until March 7, with the possibility of extending the agreement.
Lavery has played for both Canada and Northern Ireland at youth level and broke into the Owls' first team in 2012, so far scoring four league goals for the Hillsborough side.
The new Spireites signing also impressed on loan with Plymouth Argyle in the 2013/14 season, scoring three goals in eight league appearances before being recalled by his parent club.
Speaking about the latest deal on a busy transfer deadline day, Chesterfield manager Paul Cook was excited to have such a hot prospect to work with.
"We're delighted that Caolan will be joining us," said Cook. "He's a very exciting forward player who can play as a striker and we thank Sheffield Wednesday for their help with the deal.
"We're all a little disappointed at the prospect of losing Eoin Doyle but we feel that Caolan can come in and pick up exactly where Eoin left off and hit the ground running."
Lavery himself is also excited to have the chance to turn out for the Spireites.
He said: "I'm happy to be here and I'm looking forward to getting going now. I spoke to my agent this morning after training and he said that Chesterfield were interested in taking me on loan, I didn't have any second thoughts about it and came here straight away.
"I know myself how Chesterfield play. They get the ball down, pass it around and I think any players likes that style of football so I'm looking forward to getting involved and scoring a few goals."
The first Spireites interview with Lavery is now available to watch exclusively on Spireites Player.