diff --git a/paimon_python_java/gateway_server.py b/paimon_python_java/gateway_server.py
index fc05ddc..7285e98 100644
--- a/paimon_python_java/gateway_server.py
+++ b/paimon_python_java/gateway_server.py
@@ -63,6 +63,7 @@ def launch_gateway_server_process(env):
         *main_args
     ]
 
+    preexec_fn = None
     if not on_windows():
         def preexec_func():
             # ignore ctrl-c / SIGINT