The fire broke out Monday afternoon in some equipment used to test coin-making plates.
Spokesperson Christine Aquino (ah-KWEEN'-oh) says employees were evacuated safely and production resumed within a few hours.
The Winnipeg fire department says the fire was caused by overheated electrical equipment, and was contained by the building's sprinkler system.
Damage is estimated at $200,000.
The Winnipeg plant is one of the mint's two manufacturing facilities in Canada — the other is in Ottawa.