Employers added no net workers last month and the unemployment rate was unchanged, a sign that many were nervous the U.S. economy could be at risk of slipping into another recession.

The Labor Department said Friday that total payrolls were unchanged in August, the weakest report in almost a year. It’s the first time since February 1945 that the government has reported a net job change of zero. The unemployment rate stayed at 9.1 percent.

A strike by 45,000 Verizon workers lowered the job totals. Those workers are back on the job.