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-rw-r--r--pw_build_info/docs.rst4
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diff --git a/pw_build_info/docs.rst b/pw_build_info/docs.rst
index 376bd4c38..e03a94337 100644
--- a/pw_build_info/docs.rst
+++ b/pw_build_info/docs.rst
@@ -28,6 +28,10 @@ Linux executables that depend on the ``build_id`` GN target will automatically
generate GNU build IDs. Windows and macOS binaries cannot use this target as
the implementation of GNU build IDs depends on the ELF file format.
+A separate GN target ``build_id_or_noop`` is available which provides an empty
+build ID on platforms where GNU build ID is not available while still providing
+a real GNU build ID where supported.
+
Getting started
===============
To generate GNU build IDs as part of your firmware image, you'll need to update