Partition member configured to be arranged between a working chamber and a compensating chamber of an anti-vibration hydraulic mount, the partition member comprising: - a first channel configured to form a permanently open passageway between the working chamber and the compensating chamber, - a second channel configured to form a passageway between the working chamber and the compensating chamber, the second channel comprising a central passageway extending in an axial direction, the central passageway being provided with a central opening, - a receiving cavity open towards the working chamber and in fluid communication with the central passageway through the central opening, and - a membrane fixed in the receiving cavity and separating the receiving cavity into two sub-spaces separated fluidically from each other, the membrane comprising a closing device protruding from the membrane towards the central opening and being able to assume two configurations: - the closing device being spaced apart from the central opening in an open configuration when the membrane is deformed towards the central passageway over a first distance, and - the closing device abutting against the central opening to close the central passageway in a closed configuration when the membrane is deformed towards the central passageway beyond the first distance, and the closing device comprises an annular protuberance, wherein the annular protuberance shows a lateral wall, wherein the lateral wall is inclined in relation to the axial direction of the central passageway, the annular protuberance being configured for abutting against an internal circumferential wall of the central opening in a closed configuration, and wherein the central opening includes a rounded edge. - a first channel configured to form a permanently open passageway between the working chamber and the compensating chamber, - a second channel configured to form a passageway between the working chamber and the compensating chamber, the second channel comprising a central passageway extending in an axial direction, the central passageway being provided with a central opening, - a receiving cavity open towards the working chamber and in fluid communication with the central passageway through the central opening, and - a membrane fixed in the receiving cavity and separating the receiving cavity into two sub-spaces separated fluidically from each other, the membrane comprising a closing device protruding from the membrane towards the central opening and being able to assume two configurations: - the closing device being spaced apart from the central opening in an open configuration when the membrane is deformed towards the central passageway over a first distance, and - the closing device abutting against the central opening to close the central passageway in a closed configuration when the membrane is deformed towards the central passageway beyond the first distance, and the closing device comprises an annular protuberance, wherein the annular protuberance shows a lateral wall, wherein the lateral wall is inclined in relation to the axial direction of the central passageway, the annular protuberance being configured for abutting against an internal circumferential wall of the central opening in a closed configuration, and wherein the central opening includes a rounded edge.