From d0da24b6ec20e58e7eecb9d644fd71e113900f85 Mon Sep 17 00:00:00 2001
From: Robert Bradshaw <robertwb@gmail.com>
Date: Thu, 29 Oct 2026 09:47:30 -0700
Subject: [PATCH] Register _FilteringIterable as an iterable-like type.

---
 sdks/python/apache_beam/transforms/sideinputs.py | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/sdks/python/apache_beam/transforms/sideinputs.py b/sdks/python/apache_beam/transforms/sideinputs.py
index a38e05d66cbe..ac393c4c508d 100644
--- a/sdks/python/apache_beam/transforms/sideinputs.py
+++ b/sdks/python/apache_beam/transforms/sideinputs.py
@@ -31,6 +31,7 @@
 from typing import TYPE_CHECKING
 from typing import Any
 
+from apache_beam.coders import coder_impl
 from apache_beam.transforms import window
 
 if TYPE_CHECKING:
@@ -110,3 +111,7 @@ def __iter__(self):
   def __reduce__(self):
     # Pickle self as an already filtered list.
     return list, (list(self), )
+
+
+coder_impl.FastPrimitivesCoderImpl.register_iterable_like_type(
+    _FilteringIterable)