diff --git a/src/operator/subgraph/tensorrt/nnvm_to_onnx.cc b/src/operator/subgraph/tensorrt/nnvm_to_onnx.cc
index 9d98a48c2ec2..3c90d35ecd09 100644
--- a/src/operator/subgraph/tensorrt/nnvm_to_onnx.cc
+++ b/src/operator/subgraph/tensorrt/nnvm_to_onnx.cc
@@ -519,7 +519,7 @@ void ConvertConstant(
   auto size = shape.Size();
 
   if (dtype == TensorProto_DataType_FLOAT) {
-    std::shared_ptr<float> shared_data_ptr(new float[size]);
+    std::shared_ptr<float[]> shared_data_ptr(new float[size]);
     float* const data_ptr = shared_data_ptr.get();
     nd.SyncCopyToCPU(static_cast<void*>(data_ptr), size);
 
@@ -527,7 +527,7 @@ void ConvertConstant(
       initializer_proto->add_float_data(data_ptr[blob_idx]);
     }
   } else if (dtype == TensorProto_DataType_FLOAT16) {
-    std::shared_ptr<uint16_t> shared_data_ptr(new uint16_t[size]);
+    std::shared_ptr<uint16_t[]> shared_data_ptr(new uint16_t[size]);
     uint16_t* const data_ptr = shared_data_ptr.get();
     nd.SyncCopyToCPU(static_cast<void*>(data_ptr), size);
     for (size_t blob_idx = 0; blob_idx < size; ++blob_idx) {