diff --git a/homeassistant/backports/functools.py b/homeassistant/backports/functools.py
index 83d66a39f71fcb..6f12f4ada099b7 100644
--- a/homeassistant/backports/functools.py
+++ b/homeassistant/backports/functools.py
@@ -68,4 +68,4 @@ def __get__(
             raise TypeError(msg) from None
         return val
 
-    __class_getitem__ = classmethod(GenericAlias)
+    __class_getitem__ = classmethod(GenericAlias)  # type: ignore[var-annotated]