diff --git a/python/paddle_serving_server/__init__.py b/python/paddle_serving_server/__init__.py
index ad64e9787857f7b05054007055113824abb1e471..30f4583a3b785dfe8824a5c14014c5e816fbc27e 100644
--- a/python/paddle_serving_server/__init__.py
+++ b/python/paddle_serving_server/__init__.py
@@ -23,13 +23,13 @@ import paddle_serving_server as paddle_serving_server
 from .version import serving_server_version
 from contextlib import closing
 import collections
-import fcntl
-
 import shutil
 import numpy as np
 import grpc
 from .proto import multi_lang_general_model_service_pb2
 import sys
+if sys.platform.startswith('win') is False:
+    import fcntl
 sys.path.append(
     os.path.join(os.path.abspath(os.path.dirname(__file__)), 'proto'))
 from .proto import multi_lang_general_model_service_pb2_grpc