A compressor aerofoil for a turbine engine, the compressor aerofoil comprising: a root portion spaced apart from a tip portion by a main body portion; the main body portion defined by: a suction surface wall having a suction surface, a pressure surface wall having a pressure surface, whereby the suction surface wall and the pressure surface wall meet at a leading edge and a trailing edge, the tip portion comprising: a tip wall which extends from the aerofoil leading edge to the aerofoil trailing edge; the tip wall defining: a squealer comprising: a first tip wall region which extends from the leading edge; a second tip wall region which extends from the trailing edge; a third tip wall region which extends between the first tip wall region and the second tip wall region; characterised in that, the first tip wall region, third tip wall region and second tip wall region are joined to form a continuous tip wall that provides the squealer, in the first tip wall region: a pressure-side shoulder provided on the pressure surface wall extends from the leading edge part of the way towards the trailing edge; a transition region of the pressure surface wall tapers from the pressure-side shoulder in a direction towards the tip wall; and the suction surface extends towards the first tip wall region; in the second tip wall region; a suction-side shoulder provided on the suction surface wall extends from the trailing edge part of the way towards the leading edge; a transition region of the suction surface wall tapers from the suction-side shoulder in a direction towards the tip wall; and the pressure surface extends towards the second tip wall region; in the third tip wall region: the pressure surface wall transition region tapers from the pressure-side shoulder in a direction towards the tip wall; and the suction surface wall transition region tapers from the suction-side shoulder in a direction towards the tip wall. a root portion spaced apart from a tip portion by a main body portion; the main body portion defined by: a suction surface wall having a suction surface, a pressure surface wall having a pressure surface, whereby the suction surface wall and the pressure surface wall meet at a leading edge and a trailing edge, a suction surface wall having a suction surface, a pressure surface wall having a pressure surface, whereby the suction surface wall and the pressure surface wall meet at a leading edge and a trailing edge, the tip portion comprising: a tip wall which extends from the aerofoil leading edge to the aerofoil trailing edge; the tip wall defining: a squealer comprising: a first tip wall region which extends from the leading edge; a second tip wall region which extends from the trailing edge; a third tip wall region which extends between the first tip wall region and the second tip wall region; characterised in that, the first tip wall region, third tip wall region and second tip wall region are joined to form a continuous tip wall that provides the squealer, a first tip wall region which extends from the leading edge; a second tip wall region which extends from the trailing edge; a third tip wall region which extends between the first tip wall region and the second tip wall region; in the first tip wall region: a pressure-side shoulder provided on the pressure surface wall extends from the leading edge part of the way towards the trailing edge; a transition region of the pressure surface wall tapers from the pressure-side shoulder in a direction towards the tip wall; and the suction surface extends towards the first tip wall region; a pressure-side shoulder provided on the pressure surface wall extends from the leading edge part of the way towards the trailing edge; a transition region of the pressure surface wall tapers from the pressure-side shoulder in a direction towards the tip wall; and the suction surface extends towards the first tip wall region; in the second tip wall region; a suction-side shoulder provided on the suction surface wall extends from the trailing edge part of the way towards the leading edge; a transition region of the suction surface wall tapers from the suction-side shoulder in a direction towards the tip wall; and the pressure surface extends towards the second tip wall region; a transition region of the suction surface wall tapers from the suction-side shoulder in a direction towards the tip wall; and the pressure surface extends towards the second tip wall region; in the third tip wall region: the pressure surface wall transition region tapers from the pressure-side shoulder in a direction towards the tip wall; and the suction surface wall transition region tapers from the suction-side shoulder in a direction towards the tip wall. the pressure surface wall transition region tapers from the pressure-side shoulder in a direction towards the tip wall; and the suction surface wall transition region tapers from the suction-side shoulder in a direction towards the tip wall.