diff --git a/litellm/proxy/anthropic_endpoints/endpoints.py b/litellm/proxy/anthropic_endpoints/endpoints.py
index a3956ef274..78078b93f8 100644
--- a/litellm/proxy/anthropic_endpoints/endpoints.py
+++ b/litellm/proxy/anthropic_endpoints/endpoints.py
@@ -14,6 +14,7 @@ import litellm
 from litellm._logging import verbose_proxy_logger
 from litellm.proxy._types import *
 from litellm.proxy.auth.user_api_key_auth import user_api_key_auth
+from litellm.proxy.common_request_processing import ProxyBaseLLMRequestProcessing
 from litellm.proxy.common_utils.http_parsing_utils import _read_request_body
 from litellm.proxy.litellm_pre_call_utils import add_litellm_data_to_request
 from litellm.proxy.utils import ProxyLogging
@@ -89,7 +90,6 @@ async def anthropic_response(  # noqa: PLR0915
     """
     from litellm.proxy.proxy_server import (
         general_settings,
-        get_custom_headers,
         llm_router,
         proxy_config,
         proxy_logging_obj,
@@ -205,7 +205,7 @@ async def anthropic_response(  # noqa: PLR0915
         verbose_proxy_logger.debug("final response: %s", response)
 
         fastapi_response.headers.update(
-            get_custom_headers(
+            ProxyBaseLLMRequestProcessing.get_custom_headers(
                 user_api_key_dict=user_api_key_dict,
                 model_id=model_id,
                 cache_key=cache_key,