diff --git a/fastdeploy/backends/lite/lite_backend.h b/fastdeploy/backends/lite/lite_backend.h
index fed33e285..cf88390a4 100644
--- a/fastdeploy/backends/lite/lite_backend.h
+++ b/fastdeploy/backends/lite/lite_backend.h
@@ -56,14 +56,14 @@ class LiteBackend : public BaseBackend {
                       const std::string& params_file,
                       const LiteBackendOption& option = LiteBackendOption());
 
-  bool Infer(std::vector<FDTensor>& inputs, std::vector<FDTensor>* outputs);
+  bool Infer(std::vector<FDTensor>& inputs, std::vector<FDTensor>* outputs) override; // NOLINT
 
-  int NumInputs() const { return inputs_desc_.size(); }
+  int NumInputs() const override { return inputs_desc_.size(); }
 
-  int NumOutputs() const { return outputs_desc_.size(); }
+  int NumOutputs() const override { return outputs_desc_.size(); }
 
-  TensorInfo GetInputInfo(int index);
-  TensorInfo GetOutputInfo(int index);
+  TensorInfo GetInputInfo(int index) override;
+  TensorInfo GetOutputInfo(int index) override;
   std::vector<TensorInfo> GetInputInfos() override;
   std::vector<TensorInfo> GetOutputInfos() override;