We conduct a field experiment within a business plan competition to examine how institutional features influence inclusive decision-making. In the control group, over the course of independent sequential assessments, evaluators become less likely to recommend female candidates. This pattern reduces the quality of their decisions ? as measured by expert assessments and machine-learning methods. Informing judges of the organisation’s commitment to equal opportunity entirely offsets this decline, whereas requiring judges to justify their decisions to peers has a more muted effect. Our results show that decision fatigue can undermine both decision quality and inclusivity, but simple organisational messaging can resolve this.