---
id: pr-vllm-30869
repo: vllm-project/vllm
pr: 30869
title: '[Bugfix] fix the alias bug of AttentionBackendEnum when register CUSTOM attention backend to vllm'
author: zejunchen-zejun
date: '2025-12-20'
url: https://github.com/vllm-project/vllm/pull/30869
source_category: upstream-code
architectures:
- sm100
tags: []
techniques: []
hardware_features: []
kernel_types: []
languages: []
captured_at: '2026-05-16'
status: merged
merge_sha: d52c5096d7305abc7f266026cb042121ff5bccda
inclusion_reason: defer
changed_paths:
- tests/test_attention_backend_registry.py
- vllm/attention/backends/registry.py
artifact_dir: evidence/pull-bundles/vllm/gh-30869
head_ref_oid: e152940e140183b9b0c9e45db5de54fe320aa16b
---
# [Bugfix] fix the alias bug of AttentionBackendEnum when register CUSTOM attention backend to vllm

- Repository: `vllm-project/vllm`
- PR: [30869](https://github.com/vllm-project/vllm/pull/30869)
- Decision: `defer`
- Reason: defer

## Changed Paths

- `tests/test_attention_backend_registry.py`
- `vllm/attention/backends/registry.py`

## Evidence Bundle

`evidence/pull-bundles/vllm/gh-30869`
