diff --git a/source/use_case/kws_asr/include/Wav2LetterModel.hpp b/source/use_case/kws_asr/include/Wav2LetterModel.hpp
index 9a86bd9..7c327b3 100644
--- a/source/use_case/kws_asr/include/Wav2LetterModel.hpp
+++ b/source/use_case/kws_asr/include/Wav2LetterModel.hpp
@@ -58,7 +58,7 @@
         static constexpr int ms_maxOpCnt = 5;
 
         /* A mutable op resolver instance. */
-        tflite::MicroMutableOpResolver<ms_maxOpCnt> _m_opResolver;
+        tflite::MicroMutableOpResolver<ms_maxOpCnt> m_opResolver;
     };
 
 } /* namespace app */