diff --git a/homeassistant/components/systemmonitor/sensor.py b/homeassistant/components/systemmonitor/sensor.py
index 038d7c6e014517..9573a020acc055 100644
--- a/homeassistant/components/systemmonitor/sensor.py
+++ b/homeassistant/components/systemmonitor/sensor.py
@@ -155,6 +155,7 @@ def check_required_arg(value):
     "radeon 1",
     "soc-thermal 1",
     "soc_thermal 1",
+    "Tctl",
 ]