McDonald’s Co. (Japan) says it will sell small-size french fries because of a delay in imports caused by a port worker strike on the U.S. West Coast.

The company will stop selling medium and large orders starting at 10:30 a.m. Wednesday at about 3,100 outlets nationwide.

“This is a measure we’ve decided to take because we might run out of fries. We apologize to customers for the inconvenience,” a company official said.

The strike is obstructing procedures to import fries from the United States, the main area from which McDonald’s procures fries for stores in Japan, it said.