diff --git a/examples/temporal/orchestrator.py b/examples/temporal/orchestrator.py
index 810c201ea..645ae6e2b 100644
--- a/examples/temporal/orchestrator.py
+++ b/examples/temporal/orchestrator.py
@@ -25,13 +25,12 @@
 
 
 @app.async_tool(name="OrchestratorWorkflow")
-async def run_orchestrator(input: str, app_ctx: Optional[AppContext]) -> str:
+async def run_orchestrator(input: str, app_ctx: Optional[AppContext] = None) -> str:
     """
     Run the workflow, processing the input data.
 
     Args:
         input: Task description or instruction text.
-        app_ctx: Optional application context for the workflow.
 
     Returns:
         A WorkflowResult containing the processed data