In the intermediate valence (IV) CeNiIn, the Ce ions evolve towards a trivalent state with a ferromagnetic transition at low temperature when hydrogen is interstitially inserted. In this work, we present heat capacity measurements on CeNiInH 1.8 carried out under magnetic fields up to H=90 kOe. The observed lambda-anomaly and its evolution with magnetic field confirm the existence of the ferromagnetic transition. The total entropy shifts to higher temperatures with increasing field, giving rise to the appearance of magnetocaloric effect. We have found that both the isothermal magnetic entropy (DeltaS m) and the adiabatic temperature change (DeltaT ad) display significant peaks around 6.5K, despite the small magnetic moment of the Ce ions. [All rights reserved Elsevier].