diff --git a/autogen/agentchat/conversable_agent.py b/autogen/agentchat/conversable_agent.py
index 216c94c6df8..95c178aa074 100644
--- a/autogen/agentchat/conversable_agent.py
+++ b/autogen/agentchat/conversable_agent.py
@@ -837,9 +837,7 @@ def _raise_exception_on_async_reply_functions(self) -> None:
             RuntimeError: if any async reply functions are registered.
         """
         reply_functions = {
-            f["reply_func"]
-            for f in self._reply_func_list
-            if not f.get("ignore_async_in_sync_chat", False)
+            f["reply_func"] for f in self._reply_func_list if not f.get("ignore_async_in_sync_chat", False)
         }
 
         async_reply_functions = [f for f in reply_functions if inspect.iscoroutinefunction(f)]