diff --git a/homeassistant/components/sensor/strings.json b/homeassistant/components/sensor/strings.json
index 2268d2797e4..ecaeb2504d9 100644
--- a/homeassistant/components/sensor/strings.json
+++ b/homeassistant/components/sensor/strings.json
@@ -135,7 +135,7 @@
           "name": "State class",
           "state": {
             "measurement": "Measurement",
-            "measurement_angle": "Measurement Angle",
+            "measurement_angle": "Measurement angle",
             "total": "Total",
             "total_increasing": "Total increasing"
           }