diff --git a/bmspy-ups.service b/bmspy-ups.service
index aba2963..f87429c 100644
--- a/bmspy-ups.service
+++ b/bmspy-ups.service
@@ -7,8 +7,8 @@ Type=exec
 WorkingDirectory=/usr/local/bmspy
 # Send each log line to the journal at once.
 Environment=PYTHONUNBUFFERED=1
-# Add --device NAME if bmspy-server reads more than one device.
-ExecStart=uv run --no-sync bmspy-ups
+# The device name is necessary if bmspy-server reads more than one device.
+ExecStart=uv run --no-sync bmspy-ups --device network
 RestartSec=5
 Restart=on-failure
 # Status 2 is a wrong option or device name. A restart cannot fix it.