diff --git a/tensorflow/examples/speech_commands/wav_to_features.py b/tensorflow/examples/speech_commands/wav_to_features.py
index 9ed02b7ab5d..972a37f49ba 100644
--- a/tensorflow/examples/speech_commands/wav_to_features.py
+++ b/tensorflow/examples/speech_commands/wav_to_features.py
@@ -117,7 +117,7 @@ def wav_to_features(sample_rate, clip_duration_ms, window_size_ms,
       for value in features.flatten():
         if i == 0:
           f.write('\n  ')
-        f.write(' ,%f' % value)
+        f.write('%f, ' % value)
         i = (i + 1) % 10
     f.write('\n};\n')