Costco and the Teamsters union have reached a tentative agreement on a new contract, avoiding a strike, the union said Saturday.

Teamsters spokesman Matthew McQuaid confirmed the agreement, which will have to be approved by members. Details of the agreement weren’t immediately available.

The Teamsters union represents 18,000 Costco workers in six states: California, Washington, Maryland, Virginia, New Jersey and New York. Overall, Costco has 219,000 U.S. employees and 617 U.S. stores.

The company said its labor agreement with the Teamsters applies to less than 10% of those stores.

Union members wanted the company to make a contract offer that reflects its sales and profit growth. — Associated Press