diff --git a/utils/audio.py b/utils/audio.py
index 4c77dcf1..4ea5bfe0 100644
--- a/utils/audio.py
+++ b/utils/audio.py
@@ -37,7 +37,7 @@ class AudioProcessor(object):
             print(" | > Preemphasis is deactive.")
 
     def save_wav(self, wav, path):
-        wav_norm *= 32767 / max(0.01, np.max(np.abs(wav)))
+        wav_norm = wav * (32767 / max(0.01, np.max(np.abs(wav))))
         librosa.output.write_wav(path, wav_norm.astype(np.int16), self.sample_rate)
 
     def _linear_to_mel(self, spectrogram):