diff --git a/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/agent.py b/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/agent.py
index 310a85436..e5784d4f0 100644
--- a/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/agent.py
+++ b/typescript-sdk/integrations/langgraph/python/ag_ui_langgraph/agent.py
@@ -543,7 +543,7 @@ async def _handle_single_event(self, event: Any, state: State) -> AsyncGenerator
                     TextMessageContentEvent(
                         type=EventType.TEXT_MESSAGE_CONTENT,
                         message_id=current_stream["id"],
-                        delta=event["data"]["chunk"].content,
+                        delta=message_content,
                         raw_event=event,
                     )
                 )