Context : SV Psc is an asymptotic giant branch ( AGB ) star surrounded by an oxygen-rich dust envelope . The mm-CO line profile of the object ’ s outflow shows a clear double-component structure . Because of the high angular resolution , mid-IR interferometry may give strong constraints on the origin of this composite profile . Aims : The aim of this work is to investigate the morphology of the environment around SV Psc using high-angular resolution interferometry observations in the mid-IR with the Very Large Telescope MID-infrared Interferometric instrument ( VLTI/MIDI ) . Methods : Interferometric data in the N -band taken at different baseline lengths ( ranging from 32–64 m ) and position angles ( 73–142 ^ { \circ } ) allow a study of the morphology of the circumstellar environment close to the star . The data are interpreted on the basis of 2-dimensional , chromatic geometrical models using the fitting software tool GEM-FIND developed for this purpose . Results : The results favor two scenarios : ( i ) the presence of a highly inclined , optically thin , dusty disk surrounding the central star ; ( ii ) the presence of an unresolved binary companion at a separation of 13.7 ^ { +4.2 } _ { -4.8 } AU and a position angle of 121.8 ^ { \circ } ^ { +15.4 ^ { \circ } } _ { -24.5 ^ { \circ } } NE . The derived orbital period of the binary is 38.1 ^ { +20.4 } _ { -22.6 } yr . This detection is in good agreement with hydrodynamic simulations showing that a close companion could be responsible for the entrainment of the gas and dust into a circumbinary structure . Conclusions :