diff --git a/Transcoder.py b/Transcoder.py
index ace8cd9a..d34c1f72 100644
--- a/Transcoder.py
+++ b/Transcoder.py
@@ -42,7 +42,7 @@ def Transcode_file(filePath):
         command.append(outputVideoBitrate)
     if outputAudioCodec:
         command.append('-c:a')
-        command.append(outputAudioCodec)
+        command.append('lib' + outputAudioCodec + 'lame')
     if outputAudioBitrate:
         command.append('-b:a')
         command.append(outputAudioBitrate)