diff --git a/wavenet/audio_reader.py b/wavenet/audio_reader.py
index a65e9c894..85f733d6d 100644
--- a/wavenet/audio_reader.py
+++ b/wavenet/audio_reader.py
@@ -65,7 +65,7 @@ def trim_silence(audio, threshold, frame_length=2048):
     '''Removes silence at the beginning and end of a sample.'''
     if audio.size < frame_length:
         frame_length = audio.size
-    energy = librosa.feature.rmse(audio, frame_length=frame_length)
+    energy = librosa.feature.rms(audio, frame_length=frame_length)
     frames = np.nonzero(energy > threshold)
     indices = librosa.core.frames_to_samples(frames)[1]