diff --git a/python/paddle/distributed/fleet/launch_utils.py b/python/paddle/distributed/fleet/launch_utils.py
index 6f1bc10b1a7d4cb9a345ef1055cd6a9f6975c1e4..ee5eb807fad7019cd2b7dff85170325a6d8230d1 100644
--- a/python/paddle/distributed/fleet/launch_utils.py
+++ b/python/paddle/distributed/fleet/launch_utils.py
@@ -83,7 +83,7 @@ class Cluster(object):
     def __ne__(self, cluster):
         return not self.__eq__(cluster)
 
-    def update_pods(cluster):
+    def update_pods(self, cluster):
         self.pods = copy.copy(cluster.pods)
 
     def trainers_nranks(self):