In the paper ”High-NA aberration retrieval with the Extended Nijboer-Zernike vector diffraction theory” by S. van Haver, J.J.M. Braat, P. Dirksen and A.J.E.M. Janssen, published in J. Europ. Opt. Soc. Rap. Public. 1, 06004 (2006), some regrettable notation errors are present in Eq.(10), page 06004-3. In this Erratum, the correct expression is given.