diff --git a/lite/api/light_api.cc b/lite/api/light_api.cc
index 29d8f4f29ab822f8c9601bbd63a3626abbbf1818..d517383d2773a02f9edba46c6df0df131c746876 100644
--- a/lite/api/light_api.cc
+++ b/lite/api/light_api.cc
@@ -25,6 +25,8 @@ void LightPredictor::Build(const std::string& lite_model_file,
   } else {
     LoadModelNaiveFromFile(lite_model_file, scope_.get(), &cpp_program_desc_);
   }
+
+  DequantizeWeight();
   BuildRuntimeProgram(cpp_program_desc_);
   PrepareFeedFetch();
 }