diff --git a/fastapi/dependencies/utils.py b/fastapi/dependencies/utils.py
index aab41b7e3..081b63a8b 100644
--- a/fastapi/dependencies/utils.py
+++ b/fastapi/dependencies/utils.py
@@ -48,7 +48,6 @@ from fastapi._compat import (
 )
 from fastapi.background import BackgroundTasks
 from fastapi.concurrency import (
-    AsyncExitStack,
     asynccontextmanager,
     contextmanager_in_threadpool,
 )