diff --git a/homeassistant/components/wled/sensor.py b/homeassistant/components/wled/sensor.py
index 772f76767a9882..ab8ae2ac5c0e5e 100644
--- a/homeassistant/components/wled/sensor.py
+++ b/homeassistant/components/wled/sensor.py
@@ -68,7 +68,7 @@ class WLEDSensorEntityDescription(SensorEntityDescription):
     WLEDSensorEntityDescription(
         key="uptime",
         translation_key="uptime",
-        device_class=SensorDeviceClass.TIMESTAMP,
+        device_class=SensorDeviceClass.UPTIME,
         entity_category=EntityCategory.DIAGNOSTIC,
         entity_registry_enabled_default=False,
         value_fn=lambda device: utcnow() - device.info.uptime,
diff --git a/homeassistant/components/wled/strings.json b/homeassistant/components/wled/strings.json
index 2329636d068be3..5a2732c7745478 100644
--- a/homeassistant/components/wled/strings.json
+++ b/homeassistant/components/wled/strings.json
@@ -98,9 +98,6 @@
       "ip": {
         "name": "IP"
       },
-      "uptime": {
-        "name": "Uptime"
-      },
       "wifi_bssid": {
         "name": "Wi-Fi BSSID"
       },
diff --git a/tests/components/wled/snapshots/test_sensor.ambr b/tests/components/wled/snapshots/test_sensor.ambr
index a71d1688d86a5f..01894d7196be06 100644
--- a/tests/components/wled/snapshots/test_sensor.ambr
+++ b/tests/components/wled/snapshots/test_sensor.ambr
@@ -296,7 +296,7 @@
     'object_id_base': 'Uptime',
     'options': dict({
     }),
-    'original_device_class': <SensorDeviceClass.TIMESTAMP: 'timestamp'>,
+    'original_device_class': <SensorDeviceClass.UPTIME: 'uptime'>,
     'original_icon': None,
     'original_name': 'Uptime',
     'platform': 'wled',
@@ -311,7 +311,7 @@
 # name: test_snapshots[sensor.wled_rgb_light_uptime-state]
   StateSnapshot({
     'attributes': ReadOnlyDict({
-      'device_class': 'timestamp',
+      'device_class': 'uptime',
       'friendly_name': 'WLED RGB Light Uptime',
     }),
     'context': <ANY>,