diff --git a/paddle/fluid/framework/backward.cc b/paddle/fluid/framework/backward.cc
index 68f4fd4424f0825f6063434c845fcdcef715f8a2..1314af2b3dab281bd201e6a77bfbe87e0bd58ffb 100644
--- a/paddle/fluid/framework/backward.cc
+++ b/paddle/fluid/framework/backward.cc
@@ -341,7 +341,7 @@ static void CreateGradVarInBlock(
       auto* param = block_desc->FindVarRecursive(pname);
       auto* grad = block_desc->FindVar(arg);
       if (param == nullptr) {
-        grad->SetDataType(proto::DataType::FP32);
+        grad->SetDataType(proto::VarType::FP32);
       } else {
         grad->SetDataType(param->GetDataType());
       }