diff --git a/ext/dapr-ext-workflow/dapr/ext/workflow/dapr_workflow_client.py b/ext/dapr-ext-workflow/dapr/ext/workflow/dapr_workflow_client.py
index 229e59f5..6169c4b8 100644
--- a/ext/dapr-ext-workflow/dapr/ext/workflow/dapr_workflow_client.py
+++ b/ext/dapr-ext-workflow/dapr/ext/workflow/dapr_workflow_client.py
@@ -105,7 +105,7 @@ def schedule_new_workflow(
                 input=input,
                 instance_id=instance_id,
                 start_at=start_at,
-                reuse_id_policy=Union(reuse_id_policy),
+                reuse_id_policy=reuse_id_policy,
             )
         return self.__obj.schedule_new_orchestration(
             workflow.__name__, input=input, instance_id=instance_id, start_at=start_at, reuse_id_policy=Union(reuse_id_policy),