diff --git a/src/pipecat/services/openai_realtime_beta/events.py b/src/pipecat/services/openai_realtime_beta/events.py
index 48492e972..326c722c3 100644
--- a/src/pipecat/services/openai_realtime_beta/events.py
+++ b/src/pipecat/services/openai_realtime_beta/events.py
@@ -147,7 +147,7 @@ class ConversationItemDeleteEvent(ClientEvent):
 
 class ResponseCreateEvent(ClientEvent):
     type: Literal["response.create"] = "response.create"
-    response: Optional[ResponseProperties] = ResponseProperties()
+    response: Optional[ResponseProperties] = None
 
 
 class ResponseCancelEvent(ClientEvent):