diff --git a/paddle/fluid/operators/fill_constant_op.cc b/paddle/fluid/operators/fill_constant_op.cc
index bbc84ab665748a4a9ed62486ec5df4f551aac5d6..07e0a80f8d644d4d011f2821785d49ece6cecfb5 100644
--- a/paddle/fluid/operators/fill_constant_op.cc
+++ b/paddle/fluid/operators/fill_constant_op.cc
@@ -64,7 +64,7 @@ class FillConstantOpMaker : public framework::OpProtoAndCheckerMaker {
     AddAttr<int>("dtype",
                  "(int, default 5 (FP32)) "
                  "Output data type")
-        .SetDefault(framework::proto::VarType::Type::FP32);
+        .SetDefault(framework::proto::VarType::FP32);
     AddAttr<std::vector<int>>("shape", "(vector<int>) The shape of the output");
     AddAttr<float>("value", "(float, default 0) The value to be filled")
         .SetDefault(0.0f);