diff --git a/python/packages/autogen-ext/src/autogen_ext/models/openai/_openai_client.py b/python/packages/autogen-ext/src/autogen_ext/models/openai/_openai_client.py
index 02b8d911a31a..359ddfe6c8d2 100644
--- a/python/packages/autogen-ext/src/autogen_ext/models/openai/_openai_client.py
+++ b/python/packages/autogen-ext/src/autogen_ext/models/openai/_openai_client.py
@@ -94,7 +94,7 @@
 aopenai_init_kwargs = set(inspect.getfullargspec(AsyncAzureOpenAI.__init__).kwonlyargs)
 
 create_kwargs = set(completion_create_params.CompletionCreateParamsBase.__annotations__.keys()) | set(
-    ("timeout", "stream")
+    ("timeout", "stream", "extra_body")
 )
 # Only single choice allowed
 disallowed_create_args = set(["stream", "messages", "function_call", "functions", "n"])