Starbucks said Friday it plans an unspecified number of layoffs as it restructures its corporate staff.

In a note to employees, Starbucks Chairman and CEO Brian Niccol said the Seattle coffee giant needs to ensure all work has a obvious and accountable owner who can make decisions. The corporation also needs to reduce complexity and silos.

“Our size and structure can leisurely us down, with too many layers, managers of tiny teams and roles concentrated primarily on coordinating work,” Niccol wrote.

The layoffs won’t impact baristas in Starbucks’ stores. Niccol said decisions will be communicated by early March.

“I do not receive these decisions lightly, and I appreciate that this will make uncertainty and concern between now and then,” Niccol wrote. “I wanted to be transparent about our advancement and our plans and ensure that you listen about this work directly from me.”

Starbucks has approximately 16,000 corporate employees worldwide, including 10,000 in the U.S. and 6,000 in other countries. The corporation employs a total of 361,000 people worldwide, according to its annual update filed in September.

Starbucks saw disappointing sales over the last year as U.S. customers pulled back on their spending and customers in China flocked to lower-priced rivals.

In September, the corporation brought in Niccol, an experienced marketer who previously led Taco Bell and Chipotle, to assist it turn things around.