diff --git a/paddle/fluid/imperative/tracer.h b/paddle/fluid/imperative/tracer.h
index 1bcd97a9298c6c94e8ef516fde4abfa65f8b01dc..7652b3aa291ac0063fcc411b5f86f6084f01e8ef 100644
--- a/paddle/fluid/imperative/tracer.h
+++ b/paddle/fluid/imperative/tracer.h
@@ -32,7 +32,7 @@ namespace imperative {
 class UniqueNameGenerator {
  public:
   explicit UniqueNameGenerator(std::string prefix = "") : prefix_(prefix) {}
-  std::string Generate(std::string key = "tmp") {
+  std::string Generate(std::string key = "eager_tmp") {
     return prefix_ + key + "_" + std::to_string(id_++);
   }