A joystick control is disclosed for a change speed gearbox having a support body, an axle rotatably supported by the body, an operating lever connected to the axle by a pivot pin having an axis perpendicular to that of the axle such that the operating lever is rotatable about the axis of the axle and is pivotable relative to the axle about the axis of the pivot pin, two actuating members rotatably supported by the axle and arranged one on each side of the operating lever, each actuating member being connectible to a respective Bowden cable to extend and retract the cable in response to rotation of the actuating member about the axle, and mating formations on the operating lever and the actuating members operative to engage the operating lever selectively for rotation with one or the other of the actuating members in dependence upon the direction in which the operating lever is pivoted relative to the axle about the pivot pin. Resiliently biased detents are provided between the support body and the actuating members or the operating lever to resist rotation of the operating lever away from at least one defined stable position.