diff --git a/VideoNodes/FfmpegBuilderNodes/Audio/FfmpegBuilderAudioAddTrack.cs b/VideoNodes/FfmpegBuilderNodes/Audio/FfmpegBuilderAudioAddTrack.cs
index 772746f8..e4001cfa 100644
--- a/VideoNodes/FfmpegBuilderNodes/Audio/FfmpegBuilderAudioAddTrack.cs
+++ b/VideoNodes/FfmpegBuilderNodes/Audio/FfmpegBuilderAudioAddTrack.cs
@@ -363,6 +363,8 @@ public class FfmpegBuilderAudioAddTrack : FfmpegBuilderNode
         bool opus = codec == "opus"; 
         if (opus)
             codec = "libopus";
+        if (codec.ToLowerInvariant() == "mp3")
+            codec = "libmp3lame";
         bool eac3 = codec.ToLowerInvariant() == "eac3";
         bool dts = codec.ToLowerInvariant().Contains("dts");