Liquid-crystalline medium having a positive anisotropy, characterised in that it contains one or more compounds of the formula IA, and at least one compound selected from the group of compounds of the formula IIA, IIB and IIC, in which R A, R 2A, R 2B and R 2C each, independently of one another, denote H, an alkyl or alkenyl radical having up to 15 C atoms which is unsubstituted, monosubstituted by CN or CF 3 or at least monosubstituted by halogen, where, in addition, one or more CH 2 groups in these radicals may be replaced by -O-, -S-, -C≡C-, -CF 2 O-, -OCF 2 -, -OC-O- or -O-CO- in such a way that O atoms are not linked directly to one another, denotes or denotes X A denotes F, Cl, CN, SF 5, SCN, NCS, a halogenated alkyl radical, a halogenated alkenyl radical, a halogenated alkoxy radical or a halogenated alkenyloxy radical, each having up to 6 C atoms, and Y 1-6 each, independently of one another, denote H or F. L 1 and L 2 each, independently of one another, denote F, Cl, CF 3 or CHF 2, L 3-6 each, independently of one another, denote H, F, Cl, CF 3 or CHF 2, but at least two of L 3-6 denote F, Cl, CF 3 or CHF 2 Z 2 and Z 2' each, independently of one another, denote a single bond, -CH 2 CH 2 -, -CH=CH-, -C≡C-, -CF 2 O-, -OCF 2 -, -CH 2 O-, -OCH 2 -, -COO-, -OCO-, -C 2 F 4 -, -CF=CF-, -CH=CHCH 2 O-, p denotes 1 or 2, and, in the case where Z 2 = single bond, p may also denote 0, o and q each, independently of one another, denote 0 or 1, C v H 2v+1 denotes OC v H 2v+1 or C v H 2v+1, and v denotes 1 to 6, and that the liquid-crystalline medium contains at least two compounds of the formula IA and at least two compounds of the formula IIA and that further either the liquid-crystalline medium contains in total ≥ 20 % by weight of compounds of the formula IA and compounds of the formula IIB, based on the mixture or the liquid-crystalline medium contains in total ≥ 20 % by weight of compounds of the formula IA and compounds of the formula IIC, based on the mixture. R A, R 2A, R 2B and R 2C each, independently of one another, denote H, an alkyl or alkenyl radical having up to 15 C atoms which is unsubstituted, monosubstituted by CN or CF 3 or at least monosubstituted by halogen, where, in addition, one or more CH 2 groups in these radicals may be replaced by -O-, -S-, -C≡C-, -CF 2 O-, -OCF 2 -, -OC-O- or -O-CO- in such a way that O atoms are not linked directly to one another, denotes or denotes X A denotes F, Cl, CN, SF 5, SCN, NCS, a halogenated alkyl radical, a halogenated alkenyl radical, a halogenated alkoxy radical or a halogenated alkenyloxy radical, each having up to 6 C atoms, and Y 1-6 each, independently of one another, denote H or F. L 1 and L 2 each, independently of one another, denote F, Cl, CF 3 or CHF 2, L 3-6 each, independently of one another, denote H, F, Cl, CF 3 or CHF 2, but at least two of L 3-6 denote F, Cl, CF 3 or CHF 2 Z 2 and Z 2' each, independently of one another, denote a single bond, -CH 2 CH 2 -, -CH=CH-, -C≡C-, -CF 2 O-, -OCF 2 -, -CH 2 O-, -OCH 2 -, -COO-, -OCO-, -C 2 F 4 -, -CF=CF-, -CH=CHCH 2 O-, p denotes 1 or 2, and, in the case where Z 2 = single bond, p may also denote 0, o and q each, independently of one another, denote 0 or 1, C v H 2v+1 denotes OC v H 2v+1 or C v H 2v+1, and v denotes 1 to 6,