diff --git a/src/a2a/server/request_handlers/default_request_handler_v2.py b/src/a2a/server/request_handlers/default_request_handler_v2.py
index 872a3bfa2..ffdbf7178 100644
--- a/src/a2a/server/request_handlers/default_request_handler_v2.py
+++ b/src/a2a/server/request_handlers/default_request_handler_v2.py
@@ -231,7 +231,7 @@ async def _setup_active_task(
             context_id=context_id,
             call_context=call_context,
             create_task_if_missing=True,
-            initial_message=request_context.message,
+            initial_message=params.message,
         )
 
         return active_task, request_context