Unionized workers at Hyundai Heavy Industries Co., the world's largest shipbuilder, voted against a tentative wage agreement on Wednesday due to a complaint about the pay award agreed upon by the union and management, the company's union said. 

The union and management reached a tentative agreement on the pay raise on Dec. 31, which includes a basic pay increase of 37,000 won (US$33.56) per month and a special bonus of 2 million won. 

They also agreed to count regular bonuses, equal to 700 percent of the base salary, as ordinary wages, which are used as the basis for setting allowances such as overtime pay, holiday shift pay and paid annual leave, as well as pension.

The 16,000-member union put the tentative wage agreement to a vote, but 10,390 unionists, or 66.47 percent, rejected it, with the voter turnout reaching 15,632 members, or 93.26 percent. 

Additional negotiations on the pay increase are expected to take place in the future.

(Yonhap)