In one example a fluid ejection device comprises a housing and a deflector arm. The housing comprises a first housing portion and a second housing portion defining a fluid ejection aperture therebetween. The fluid ejection aperture is to direct fluid towards a roller. The deflector arm is movable within the fluid ejection aperture between first and second positions. In the first position, the deflector arm is proximate the second housing portion to thereby direct fluid between the deflector arm and the first housing portion and toward a target area on a surface of the roller. In the second position, the deflector arm is proximate the first housing portion to thereby direct fluid between the deflector arm and the second housing portion. The second housing portion comprises a curved surface such that, when the deflector arm is in the second position, fluid is directed away from the target area.