diff --git a/arraycontext/container/__init__.py b/arraycontext/container/__init__.py
index 55deb90cc8cf5adc5697d1b0f83f8b61cf667194..d484277da01f9db2f365fbf055ee4c94bb688622 100644
--- a/arraycontext/container/__init__.py
+++ b/arraycontext/container/__init__.py
@@ -122,7 +122,7 @@ class NotAnArrayContainerError(TypeError):
 
 
 @singledispatch
-def serialize_container(ary: ArrayContainer) -> Iterable[Tuple[Any, Any]]:
+def serialize_container(ary: Any) -> Iterable[Tuple[Any, Any]]:
     r"""Serialize the array container into an iterable over its components.
 
     The order of the components and their identifiers are entirely under