diff --git a/paddle/fluid/distributed/fleet_executor/carrier.h b/paddle/fluid/distributed/fleet_executor/carrier.h
index 7762effdb9c871fe22585acf32c5977846df5d09..9a74fa78c0e7638cd9c5201b92b06619c1f5b10c 100644
--- a/paddle/fluid/distributed/fleet_executor/carrier.h
+++ b/paddle/fluid/distributed/fleet_executor/carrier.h
@@ -101,8 +101,8 @@ class Carrier final {
   std::mutex running_mutex_;
   std::condition_variable cond_var_;
   std::vector<framework::Scope*> microbatch_scopes_;
-  framework::Scope* root_scope_;
-  framework::Scope* minibatch_scope_;
+  framework::Scope* root_scope_{nullptr};
+  framework::Scope* minibatch_scope_{nullptr};
   paddle::platform::Place place_;
   paddle::platform::DeviceContext* dev_ctx_{nullptr};
   int64_t rank_;