diff --git a/homeassistant/components/motion_blinds/sensor.py b/homeassistant/components/motion_blinds/sensor.py
index 126c1607864..6414a010dc1 100644
--- a/homeassistant/components/motion_blinds/sensor.py
+++ b/homeassistant/components/motion_blinds/sensor.py
@@ -3,7 +3,7 @@ from motionblinds import BlindType
 
 from homeassistant.components.sensor import SensorDeviceClass, SensorEntity
 from homeassistant.const import PERCENTAGE, SIGNAL_STRENGTH_DECIBELS_MILLIWATT
-from homeassistant.helpers.entity import DeviceInfo
+from homeassistant.helpers.entity import DeviceInfo, EntityCategory
 from homeassistant.helpers.update_coordinator import CoordinatorEntity
 
 from .const import ATTR_AVAILABLE, DOMAIN, KEY_COORDINATOR, KEY_GATEWAY
@@ -117,6 +117,7 @@ class MotionSignalStrengthSensor(CoordinatorEntity, SensorEntity):
     _attr_device_class = SensorDeviceClass.SIGNAL_STRENGTH
     _attr_entity_registry_enabled_default = False
     _attr_native_unit_of_measurement = SIGNAL_STRENGTH_DECIBELS_MILLIWATT
+    _attr_entity_category = EntityCategory.DIAGNOSTIC
 
     def __init__(self, coordinator, device, device_type):
         """Initialize the Motion Signal Strength Sensor."""