Germany will define its own security standards for a new 5G mobile network, Chancellor Angela Merkel said on Tuesday, after Washington said it would scale back data-sharing with Berlin if China’s Huawei was allowed to participate, Reuters reported.

Merkel’s conservatives chafed at what some saw as a threat by Washington, although Germany’s transatlantic coordinator emphasized that Berlin shared U.S. concerns about Huawei’s ability to meet high security standards for the new network.

Merkel told reporters the German government was keenly focused on security of digital networks, including the 5G mobile infrastructure, but Berlin would keep its own counsel.

“Security, particularly when it comes to the expansion of the 5G network, but also elsewhere in the digital area, is a very important concern for the German government, so we are defining our standards for ourselves,” Merkel said.

She said the German government would discuss its concerns with its partners in Europe, “as well as the appropriate offices in the United States.”