A refrigerator assembly includes a mullion assembly movably attached with respect to the refrigerator assembly. The mullion assembly includes a mullion portion defining a mullion recess. The mullion recess receives a biasing device for engaging a follower. A hinge assembly is attached to the mullion portion such that the mullion portion is movable with respect to the hinge assembly between a first position and a second position. The hinge assembly includes a first recess for receiving the follower when the mullion portion is in the first position. The hinge assembly further includes a second recess for receiving the follower when the mullion portion is in the second position.