Correction to Wärtsilä's earlier announcement regarding disclosure policy

Wärtsilä Corporation, Company announcement, 1 June 2012 at 16.40 EET Wärtsilä's disclosure policy with regards to the use of the Swedish language has not changed. Wärtsilä continues to publish all official material in Swedish. Furthermore, Wärtsilä's corporate website continues to be updated in Swedish. The updated disclosure policy is available on Wärtsilä's website at www.wartsila.com/investors. For further information, please contact: Pauliina Tennilä Director, Investor Relations Wärtsilä Corporation Tel: +358 40 570 5530 pauliina.tennila@wartsila.com Press contact: Atte Palomäki Group Vice President, Communications & Branding Wärtsilä Corporation Tel: +358 40 547 6390 atte.palomaki@wartsila.com Wärtsilä in brief Wärtsilä is a global leader in complete lifecycle power solutions for the marine and energy markets. By emphasising technological innovation and total efficiency, Wärtsilä maximises the environmental and economic performance of the vessels and power plants of its customers. In 2011, Wärtsilä's net sales totalled EUR 4.2 billion with approximately 18,000 employees. The company has operations in nearly 170 locations in 70 countries around the world. Wärtsilä is listed on the NASDAQ OMX Helsinki, Finland. www.wartsila.com This announcement is distributed by Thomson Reuters on behalf of Thomson Reuters clients. The owner of this announcement warrants that: (i) the releases contained herein are protected by copyright and other applicable laws; and (ii) they are solely responsible for the content, accuracy and originality of the information contained therein. Source: Wärtsilä Oyj Abp via Thomson Reuters ONE [HUG#1616834]