diff --git a/paddle/fluid/framework/details/multi_devices_graph_builder.cc b/paddle/fluid/framework/details/multi_devices_graph_builder.cc
index 635faafe4c62513d6efca426c639b8f6dfa29a2f..1c1b11d0e445b97469a19ca7c09ddfe249b1b63f 100644
--- a/paddle/fluid/framework/details/multi_devices_graph_builder.cc
+++ b/paddle/fluid/framework/details/multi_devices_graph_builder.cc
@@ -191,7 +191,6 @@ std::unique_ptr<SSAGraph> MultiDevSSAGraphBuilder::Build(
   };
 
   bool is_forwarding = true;
-  std::unordered_map<std::string, int> rpc_var_device_mapping;
   int rpc_op_device_id = 0;
   auto schedule_rpc_op = [&]() -> void {
     rpc_op_device_id++;