We examine the relation between lockup length and voluntary earnings forecast disclosures for IPOs in Singapore. Unlike firms in the United States, companies in Singapore are allowed to provide earnings forecasts in their IPO prospectuses. We find that forecasters are more likely to accept longer lockup periods, so that the lockup expires after the first post-IPO earnings announcement. Our study also shows that because the lockup agreement removes personal incentives to issue aggressive forecasts, IPO firms tend to issue conservative forecasts. Overall, our results suggest that the lockup mechanism adds credibility to the earnings forecast given in the IPO prospectus.