diff --git a/litellm/realtime_api/main.py b/litellm/realtime_api/main.py
index 01b83067650..03448382c7a 100644
--- a/litellm/realtime_api/main.py
+++ b/litellm/realtime_api/main.py
@@ -265,7 +265,7 @@ async def _realtime_health_check(
     ssl_context = get_shared_realtime_ssl_context()
     async with websockets.connect(  # type: ignore
         url,
-        additional_headers={
+        extra_headers={
             "api-key": api_key,  # type: ignore
         },
         max_size=REALTIME_WEBSOCKET_MAX_MESSAGE_SIZE_BYTES,