diff --git a/examples/chef/chef.py b/examples/chef/chef.py
index 705395fa8d978f..0ad749b19c295a 100755
--- a/examples/chef/chef.py
+++ b/examples/chef/chef.py
@@ -267,7 +267,7 @@ def main(argv: Sequence[str]) -> None:
             target_file_ext = ".zap"
             if device_dir_item.endswith(target_file_ext) and device_dir_item in chef_util.ci_allowlist:
                 device_name = device_dir_item[:-len(target_file_ext)]
-                command = './chef.py -cbr --use-zzz -d {} -t {}'.format(device_name, options.build_target)
+                command = './chef.py -cbr --use_zzz -d {} -t {}'.format(device_name, options.build_target)
                 subprocess.check_call(command, cwd=_CHEF_SCRIPT_PATH, shell=True)
         exit(0)