A malodour-counteracting composition comprising (i) a salt of general formula (I) €ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ R 1 R 2 R 3 R 4 N + X - €ƒ€ƒ€ƒ€ƒ€ƒ(I) wherein R 1 ,R 2 , R 3 , R 4 are independently selected from C 1-4 alkyl, or R 1 , R 2 , R 3 , R 4 may together constitute a nitrogen-containing cyclic system in which the nitrogen is part of a pyridinium or an imidazolinium ring; and X- is a counterion characterised by its protonated form having an acidity constant (pKa) lying between 1 and 6; and (ii) an alpha, beta-unsaturated carbonyl compound of the general formula €ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ R 5 R 6 C=CR 7 C(=O)YR 8 €ƒ€ƒ€ƒ€ƒ€ƒ(II) in which R 5 , R 6 , R 7 , R 8 and Y are selected such that; (a) R 5 , R 6 , R 7 , R 8 are independently selected from hydrogen and C 1-10 hydrocarbyl residues which may be saturated, unsaturated, aromatic, cyclic, branched or unbranched, and which are optionally substituted, and Y is a covalent bond; or (b) at least one of R 5 and R 6 is an ester group, the other and R 7 are selected as described in (a) and Y is oxygen, such that the compound is a di-ester or tri-ester. The composition may be incorporated into consumer products and is able to remove malodours from the air or from surfaces.L'invention concerne une composition pour combattre les mauvaises odeurs qui comprend (i) un sel de formule générale (I) R1R2R3R4N+ X' dans laquelle R1, R2, R3, R4 sont indépendamment sélectionnés parmi alkyle C1-4, ou R1, R2, R3, R4 peuvent constituer ensemble un système cyclique contenant de l'azote dans lequel l'azote fait partie d'un anneau pyridinium ou imidazolinium; et X' est un contre-ion caractérisé par sa forme protonée présentant une constant d'acidité (pKa) comprise entre 1 et 6; et (ii) un composé carbonyle alpha, bêta insaturé de formule générale R5R6C=CR7C(=O)YR8 (II) dans laquelle R5, R6, R7 et R8 sont indépendamment sélectionnés parmi hydrogène et des résidus hydrocarbyle C1-10 qui peuvent être saturés, insaturés, aromatiq