diff --git a/homeassistant/components/devolo_home_network/entity.py b/homeassistant/components/devolo_home_network/entity.py
index 56a1043d126..ff0b2ba2c48 100644
--- a/homeassistant/components/devolo_home_network/entity.py
+++ b/homeassistant/components/devolo_home_network/entity.py
@@ -53,6 +53,7 @@ class DevoloEntity(Entity):
             manufacturer="devolo",
             model=device.product,
             name=entry.title,
+            serial_number=device.serial_number,
             sw_version=device.firmware_version,
         )
         self._attr_translation_key = self.entity_description.key