diff --git a/fastapi/routing.py b/fastapi/routing.py
index 2d58dcb1cb..da2a38c53f 100644
--- a/fastapi/routing.py
+++ b/fastapi/routing.py
@@ -1001,7 +1001,7 @@ class APIRoute(routing.Route):
         )
 
     @cached_property
-    def app(self) -> ASGIApp:
+    def app(self) -> ASGIApp:  # type: ignore
         return request_response(self.get_route_handler())
 
     def init_attributes(self) -> None: