diff --git a/graphrag/index/run/utils.py b/graphrag/index/run/utils.py
index 52b1f0bd31..85e7789aca 100644
--- a/graphrag/index/run/utils.py
+++ b/graphrag/index/run/utils.py
@@ -43,8 +43,8 @@ def create_callback_chain(
 ) -> WorkflowCallbacks:
     """Create a callback manager that encompasses multiple callbacks."""
     manager = WorkflowCallbacksManager()
-    for callback in callbacks or []:
-        manager.register(callback)
+    if callbacks:
+        manager._callbacks.extend(callbacks)
     return manager