diff --git a/aiogram/types/downloadable.py b/aiogram/types/downloadable.py
index be808293..080caf64 100644
--- a/aiogram/types/downloadable.py
+++ b/aiogram/types/downloadable.py
@@ -2,4 +2,5 @@ from typing import Protocol
 
 
 class Downloadable(Protocol):
-    file_id: str
+    @property
+    def file_id(self) -> str: ...