diff --git a/source/use_case/asr/include/Wav2LetterPostprocess.hpp b/source/use_case/asr/include/Wav2LetterPostprocess.hpp
index a744e0f..29eb548 100644
--- a/source/use_case/asr/include/Wav2LetterPostprocess.hpp
+++ b/source/use_case/asr/include/Wav2LetterPostprocess.hpp
@@ -18,7 +18,7 @@
 #define ASR_WAV2LETTER_POSTPROCESS_HPP
 
 #include "TensorFlowLiteMicro.hpp" /* TensorFlow headers. */
-#include "hal.h"    /* stdout facility. */
+#include "log_macros.h"
 
 namespace arm {
 namespace app {
diff --git a/source/use_case/asr/include/Wav2LetterPreprocess.hpp b/source/use_case/asr/include/Wav2LetterPreprocess.hpp
index b0e0c67..13d1589 100644
--- a/source/use_case/asr/include/Wav2LetterPreprocess.hpp
+++ b/source/use_case/asr/include/Wav2LetterPreprocess.hpp
@@ -21,6 +21,7 @@
 #include "Wav2LetterMfcc.hpp"
 #include "AudioUtils.hpp"
 #include "DataStructures.hpp"
+#include "log_macros.h"
 
 namespace arm {
 namespace app {