diff --git a/src/openai/resources/realtime/realtime.py b/src/openai/resources/realtime/realtime.py
index 8e42e16870..a91d007aff 100644
--- a/src/openai/resources/realtime/realtime.py
+++ b/src/openai/resources/realtime/realtime.py
@@ -605,7 +605,7 @@ def send(self, event: RealtimeClientEvent | RealtimeClientEventParam) -> None:
         data = (
             event.to_json(use_api_names=True, exclude_defaults=True, exclude_unset=True)
             if isinstance(event, BaseModel)
-            else json.dumps(event)
+            else json.dumps(maybe_transform(event, RealtimeClientEventParam))
         )
         self.__send_queue.enqueue(data)
 
@@ -1073,7 +1073,7 @@ def send(self, event: RealtimeClientEvent | RealtimeClientEventParam) -> None:
         data = (
             event.to_json(use_api_names=True, exclude_defaults=True, exclude_unset=True)
             if isinstance(event, BaseModel)
-            else json.dumps(event)
+            else json.dumps(maybe_transform(event, RealtimeClientEventParam))
         )
         self.__send_queue.enqueue(data)