The present invention is directed to a nail lacquer consisting essentially of ciclopirox as an antimycotic agent, hydroxypropyl chitosan as film forming agent, water and a lower alkanol as solvent. The invention is also directed to such a nail lacquer for use in treating onychomycosis.Linvention concerne un vernis à ongles constitué essentiellement de ciclopirox comme agent antimycotique, dhydroxypropyl chitosan comme agent filmogène, deau et dun alcanol inférieur comme solvant. Linvention concerne également à lutilisation de ce vernis à ongles dans le traitement de lonychomycose.