From 8c0df783cee8789950c64e2d316e3b154c488e21 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Sebasti=C3=A1n=20Ram=C3=ADrez?= <tiangolo@gmail.com>
Date: Fri, 21 Mar 2025 19:30:18 +0100
Subject: [PATCH] =?UTF-8?q?=F0=9F=90=9B=20Fix=20convert=20underscores=20lo?=
 =?UTF-8?q?gic=20for=20OpenAPI?=
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---
 fastapi/openapi/utils.py | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/fastapi/openapi/utils.py b/fastapi/openapi/utils.py
index e89198630..808646cc2 100644
--- a/fastapi/openapi/utils.py
+++ b/fastapi/openapi/utils.py
@@ -135,10 +135,15 @@ def _get_openapi_operation_parameters(
                 separate_input_output_schemas=separate_input_output_schemas,
             )
             name = param.alias
+            convert_underscores = getattr(
+                param.field_info,
+                "convert_underscores",
+                default_convert_underscores,
+            )
             if (
                 param_type == ParamTypes.header
                 and param.alias == param.name
-                and default_convert_underscores
+                and convert_underscores
             ):
                 name = param.name.replace("_", "-")