diff --git a/homeassistant/components/filesize/sensor.py b/homeassistant/components/filesize/sensor.py
index fb5b498e106..2152243b8dd 100644
--- a/homeassistant/components/filesize/sensor.py
+++ b/homeassistant/components/filesize/sensor.py
@@ -56,7 +56,6 @@ SENSOR_TYPES = (
         icon=ICON,
         name="Last Updated",
         device_class=SensorDeviceClass.TIMESTAMP,
-        state_class=SensorStateClass.MEASUREMENT,
         entity_category=EntityCategory.DIAGNOSTIC,
     ),
 )