diff --git a/backend/open_webui/utils/middleware.py b/backend/open_webui/utils/middleware.py
index d97baf92e..88c6fde14 100644
--- a/backend/open_webui/utils/middleware.py
+++ b/backend/open_webui/utils/middleware.py
@@ -1558,7 +1558,7 @@ async def process_chat_response(
 
                                     value = delta.get("content")
 
-                                    reasoning_content = delta.get("reasoning_content")
+                                    reasoning_content = delta.get("reasoning_content") or delta.get("reasoning")
                                     if reasoning_content:
                                         if (
                                             not content_blocks