diff --git a/python/paddle_serving_server_gpu/web_service.py b/python/paddle_serving_server_gpu/web_service.py
index 3081f15fe4e5635b5ea54c674adf00f6c5f9b40b..25e3a315dd5b848c77b9533a974d7707e5b67991 100755
--- a/python/paddle_serving_server_gpu/web_service.py
+++ b/python/paddle_serving_server_gpu/web_service.py
@@ -115,7 +115,7 @@ class WebService(object):
             elif isinstance(feed, dict):
                 if "fetch" in feed:
                     del feed["fetch"]
-                fetch_map = self.client_service.predict(feed=feed, fetch=fetch)
+                fetch_map = self.client.predict(feed=feed, fetch=fetch)
                 result = self.postprocess(
                     feed=request.json, fetch=fetch, fetch_map=fetch_map)
         except ValueError: