diff --git a/llama-index-core/llama_index/core/llms/callbacks.py b/llama-index-core/llama_index/core/llms/callbacks.py
index d63a0327f17e31b9e828ff3b466ed072da93c478..e3602007d1f61c4890d6b3a69fe48a457cd56585 100644
--- a/llama-index-core/llama_index/core/llms/callbacks.py
+++ b/llama-index-core/llama_index/core/llms/callbacks.py
@@ -260,7 +260,7 @@ def llm_completion_callback() -> Callable:
                         CBEventType.LLM,
                         payload={
                             EventPayload.PROMPT: args[0],
-                            EventPayload.RESPONSE: f_return_val,
+                            EventPayload.COMPLETION: f_return_val,
                         },
                         event_id=event_id,
                     )