In the article “Adverse Effects of Aromatase Inhibition on the Brain and Behavior in a Nonhuman Primate,” by Nicole J. Gervais, Luke Remage-Healey, Joseph R. Starrett, Daniel J. Pollak, Jessica A. Mong, and Agnès Lacreuse, which appeared on pages 918–928 of the January 30, 2019 issue, the sentence “the animals were gonadectomized (GDX) ∼3 years before the start of the experiment” should have read “for an average of 3.67 years (1.8–5.9 years).” Also, in light of the ARRIVE guidelines published after this article, the authors would like to clarify that the monkeys had participated in prior experiments. One female in the vehicle group, and one female in the letrozole group had a wireless telemeter implant (Gervais et al., Neuroscience, 2016) that did not alter their normal behavior or performance on the tasks. Eight males and females from both groups had received short-term hormonal treatment (for 4 weeks or for <6 months) ending 3 months, or more than a year, respectively, prior the start of this study. The data and conclusions of the article remain unchanged.