diff --git a/onnxruntime/core/providers/webnn/builders/model_builder.cc b/onnxruntime/core/providers/webnn/builders/model_builder.cc
index c46b04a3c2..6b0e1495f5 100644
--- a/onnxruntime/core/providers/webnn/builders/model_builder.cc
+++ b/onnxruntime/core/providers/webnn/builders/model_builder.cc
@@ -104,8 +104,7 @@ Status ModelBuilder::RegisterInitializers() {
       if (tensor.has_raw_data()) {
         tensor_ptr = reinterpret_cast<std::byte*>(const_cast<char*>(tensor.raw_data().c_str()));
       } else {
-        unpacked_tensors_.push_back({});
-        std::vector<uint8_t>& unpacked_tensor = unpacked_tensors_.back();
+        std::vector<uint8_t> unpacked_tensor;
         ORT_RETURN_IF_ERROR(onnxruntime::utils::UnpackInitializerData(tensor, unpacked_tensor));
         tensor_ptr = reinterpret_cast<std::byte*>(unpacked_tensor.data());
       }
diff --git a/onnxruntime/core/providers/webnn/builders/model_builder.h b/onnxruntime/core/providers/webnn/builders/model_builder.h
index 80077b3abe..6a1688f16d 100644
--- a/onnxruntime/core/providers/webnn/builders/model_builder.h
+++ b/onnxruntime/core/providers/webnn/builders/model_builder.h
@@ -66,7 +66,6 @@ class ModelBuilder {
   emscripten::val wnn_builder_ = emscripten::val::object();
   DataLayout preferred_layout_;
   WebnnDeviceType wnn_device_type_;
-  std::vector<std::vector<uint8_t>> unpacked_tensors_;
   InlinedHashMap<std::string, emscripten::val> wnn_operands_;
   std::vector<std::string> input_names_;
   std::vector<std::string> output_names_;