diff --git a/backend/open_webui/models/chats.py b/backend/open_webui/models/chats.py
index 3644c53e14..3ae7112f3e 100644
--- a/backend/open_webui/models/chats.py
+++ b/backend/open_webui/models/chats.py
@@ -441,7 +441,7 @@ class ChatTable:
                 direction = filter.get("direction")
 
                 if order_by and direction:
-                    if not getattr(Chat, order_by):
+                    if not getattr(Chat, order_by, None):
                         raise ValueError("Invalid order_by field")
 
                     if direction.lower() == "asc":