diff --git a/homeassistant/components/sonos/speaker.py b/homeassistant/components/sonos/speaker.py
index 7777265a124..b5ae20e1123 100644
--- a/homeassistant/components/sonos/speaker.py
+++ b/homeassistant/components/sonos/speaker.py
@@ -701,7 +701,7 @@ class SonosSpeaker:
         """Handle callback for topology change event."""
         if xml := event.variables.get("zone_group_state"):
             zgs = ET.fromstring(xml)
-            for vanished_device in zgs.find("VanishedDevices"):
+            for vanished_device in zgs.find("VanishedDevices") or []:
                 if (reason := vanished_device.get("Reason")) != "sleeping":
                     _LOGGER.debug(
                         "Ignoring %s marked %s as vanished with reason: %s",