diff --git a/speech_recognition/audio.py b/speech_recognition/audio.py
index 2322f36e..7e0c3ee6 100644
--- a/speech_recognition/audio.py
+++ b/speech_recognition/audio.py
@@ -250,6 +250,7 @@ def get_flac_data(self, convert_rate=None, convert_width=None):
                 "--best",  # highest level of compression available
                 "-",  # the input FLAC file contents will be given in stdin
             ],
+            stderr=subprocess.DEVNULL,
             stdin=subprocess.PIPE,
             stdout=subprocess.PIPE,
             startupinfo=startup_info,