diff --git a/paddle/fluid/operators/sum_op.cc b/paddle/fluid/operators/sum_op.cc
index 119c48f0dd9c097dc23c40bb79560912d7b64f70..c3abb3ea4a53126c22c817069e8ad955b202f09d 100644
--- a/paddle/fluid/operators/sum_op.cc
+++ b/paddle/fluid/operators/sum_op.cc
@@ -73,7 +73,8 @@ class SumOp : public framework::OperatorWithKernel {
                         "Sum operator should have at least one tensor");
 
       return framework::OpKernelType(
-          static_cast<framework::proto::VarType::Type>(dtype), ctx.device_context());
+          static_cast<framework::proto::VarType::Type>(dtype),
+          ctx.device_context());
     } else if (x_vars[0]->IsType<framework::SelectedRows>()) {
       return framework::OpKernelType(
           framework::ToDataType(