Journal article: This note acknowledges and corrects a programming error in our paper "Inequality of Opportunity in Brazil" (Review of Income and Wealth, 53(4), 585-618, 2007). Once the error is corrected, our bounds approach to the identification of individual model parameters in the presence of omitted variable biases is much less useful than indicated in the original paper. In the specific context of the measurement of inequality of opportunity, this implies that the decomposition of overall inequality of opportunity into direct and indirect effects is not reliable. However, the parametric approach introduced in our paper remains useful for obtaining a lower-bound estimate of overall ex-ante inequality of opportunity, as proposed by Ferreira and Gignoux (2011).