diff --git a/src/models/helper.py b/src/models/helper.py
index 78c41c1..e167049 100644
--- a/src/models/helper.py
+++ b/src/models/helper.py
@@ -18,7 +18,7 @@ def filter_devices(
     devices: list[GenericDevice], type: DEVICE_TYPE
 ) -> list[DEVICE_TYPE]:
     """Filters out devices that are not of a specific type."""
-    filtered_devices: list[type] = [
+    filtered_devices: list[DEVICE_TYPE] = [
         device for device in devices if isinstance(device, type)
     ]