diff --git a/paddle/fluid/imperative/tracer.h b/paddle/fluid/imperative/tracer.h
index 58d73640637eebf29c7c39e88d2aa2f1702ee27f..f225d8abe6c0635d2bdd8dba0b12c7fc3a4110db 100644
--- a/paddle/fluid/imperative/tracer.h
+++ b/paddle/fluid/imperative/tracer.h
@@ -48,7 +48,6 @@ class Tracer {
   std::vector<VarBase*> PyTrace(OpBase* op, const std::vector<VarBase*>& inputs,
                                 bool stop_gradient = false);
 
-
  private:
   framework::BlockDesc* root_block_;
 };