diff --git a/demo-serving/op/ctr_prediction_op.cpp b/demo-serving/op/ctr_prediction_op.cpp
index 806dbc7c87b20271d68c7c0c590c889d4dff622e..7253e2eba4e5df8a3026c0d324d8b948fc5b1578 100644
--- a/demo-serving/op/ctr_prediction_op.cpp
+++ b/demo-serving/op/ctr_prediction_op.cpp
@@ -133,7 +133,7 @@ int CTRPredictionOp::inference() {
 
       for (int j = 0; j < values[i].buff.size(); ++j) {
         oss << std::hex << std::uppercase << std::setw(2) << std::setfill('0')
-            << (reinterpret_cast<int>(value[j]) & 0xff);
+            << (static_cast<int>(value[j]) & 0xff);
       }
 
       LOG(INFO) << oss.str().c_str();