PurposeThe purpose of this study is to examine whether board diversity can attenuate weaker executive directors' pay-performance link in high free cash flow and low-growth firms (HFCF_LGRW).Design/methodology/approachThis study employed the Malaysian dataset from 2005 till 2016 and the fixed-effect model to investigate the developed hypotheses. The two-stage least squares method (2SLS) is employed to mitigate endogeneity issues.FindingsThis study finds that a positive association between executive directors' pay and firm performance is weaker in HFCF_LGRW firms. However, board diversity, namely ethnic and gender diversity, can mitigate weaker executive directors' pay-performance link, indicating effective monitoring.Originality/valueThis study is among the first to reveal that executive directors' pay-performance link is weaker in firms with HFCF_LGRW growth, consistent with Jensen's (1986) free cash flow hypothesis. However, findings suggest that this agency problem in HFCF_LGRW firms is attenuated by board diversity, namely ethnic and gender diversity. This supports the notion that diversity in corporate boards serves as an effective internal monitor.