The inelastic scattering of 16O and 18O projectiles by 58Ni and 64Ni has been studied to investigate the interference between Coulomb and nuclear excitation. The interference minimum for the excitation of the first 2 + state in 18O is found to be shifted towards forward angles when compared to the excitation of the 2 + state in the Ni target nuclei. This shift could not be reproduced by first order DWBA calculations, but reasonable agreement was obtained in a coupled channel analysis allowing for reorientation effects. The coupled channel results depended sensitively on the values of the static quadrupole moments of the excited 2 + states.