diff --git a/python/paddle/fluid/transpiler/details/checkport.py b/python/paddle/fluid/transpiler/details/checkport.py
index b201935ef45057a2ab0a149faa9a04bf59eccf8b..6b78ceeaeec4d9b3db6524a5b5e939f88267340c 100644
--- a/python/paddle/fluid/transpiler/details/checkport.py
+++ b/python/paddle/fluid/transpiler/details/checkport.py
@@ -43,7 +43,7 @@ def wait_server_ready(endpoints):
                 result = sock.connect_ex((ip_port[0], int(ip_port[1])))
                 if result != 0:
                     all_ok = False
-                    not_ready_endpoints.append(ip_port)
+                    not_ready_endpoints.append(ep)
         if not all_ok:
             sys.stderr.write("pserver not ready, wait 3 sec to retry...\n")
             sys.stderr.write("not ready endpoints:" + str(not_ready_endpoints) +