An airbag assembly for a vehicle includes a housing, an airbag, and a flap. The airbag is stored in the housing. The flap is secured to the housing and is configured to retain the airbag in a stored state. The flap has a tear seam at which the flap is configured to separate upon deployment of the airbag. The tear seam extends non-linearly from a first lateral edge to a second lateral edge.