diff --git a/kasa/smart/smartdevice.py b/kasa/smart/smartdevice.py
index 176efb71..48f50c0e 100644
--- a/kasa/smart/smartdevice.py
+++ b/kasa/smart/smartdevice.py
@@ -167,7 +167,14 @@ class SmartDevice(Device):
             self._last_update, "get_child_device_list", {}
         ):
             for info in child_info["child_device_list"]:
-                self._children[info["device_id"]]._update_internal_state(info)
+                child_id = info["device_id"]
+                if child_id not in self._children:
+                    _LOGGER.debug(
+                        "Skipping child update for %s, probably unsupported device",
+                        child_id,
+                    )
+                    continue
+                self._children[child_id]._update_internal_state(info)
 
     def _update_internal_info(self, info_resp: dict) -> None:
         """Update the internal device info."""
diff --git a/kasa/smartcam/smartcamdevice.py b/kasa/smartcam/smartcamdevice.py
index d75c378b..0090117e 100644
--- a/kasa/smartcam/smartcamdevice.py
+++ b/kasa/smartcam/smartcamdevice.py
@@ -68,7 +68,14 @@ class SmartCamDevice(SmartDevice):
             self._last_update, "getChildDeviceList", {}
         ):
             for info in child_info["child_device_list"]:
-                self._children[info["device_id"]]._update_internal_state(info)
+                child_id = info["device_id"]
+                if child_id not in self._children:
+                    _LOGGER.debug(
+                        "Skipping child update for %s, probably unsupported device",
+                        child_id,
+                    )
+                    continue
+                self._children[child_id]._update_internal_state(info)
 
     async def _initialize_smart_child(
         self, info: dict, child_components: dict