The authors, Hui Zou and Trevor Hastie, from Stanford University, USA, acknowledge an important reference they missed in Section 3.4 of their paper published in the *Journal of the Royal Statistical Society B* (2005). They correct the statement regarding the LARS algorithm, which was used to efficiently solve the lasso solution path. The piecewise linearity of the lasso solution path was first proven by Osborne et al. (2000), who also proposed an efficient algorithm for calculating the complete lasso solution path.The authors, Hui Zou and Trevor Hastie, from Stanford University, USA, acknowledge an important reference they missed in Section 3.4 of their paper published in the *Journal of the Royal Statistical Society B* (2005). They correct the statement regarding the LARS algorithm, which was used to efficiently solve the lasso solution path. The piecewise linearity of the lasso solution path was first proven by Osborne et al. (2000), who also proposed an efficient algorithm for calculating the complete lasso solution path.