diff --git a/AudioNodes/Nodes/ConvertFlowElements/ConvertNode.cs b/AudioNodes/Nodes/ConvertFlowElements/ConvertNode.cs
index ac138042..04c3ffc2 100644
--- a/AudioNodes/Nodes/ConvertFlowElements/ConvertNode.cs
+++ b/AudioNodes/Nodes/ConvertFlowElements/ConvertNode.cs
@@ -29,8 +29,11 @@ namespace FileFlows.AudioNodes
             extension = null;
             string codecKey = Codec + "_codec";
             string codec = args.GetToolPathActual(codecKey)?.EmptyAsNull() ?? Codec;
-            if (codec == "mp3")
+            if (codec.ToLowerInvariant() == "mp3")
+            {
                 extension = "mp3";
+                codec = "mp3";
+            }
             else if (codec == "libopus")
                 extension = "ogg";
             else if (codec == "libvorbis" || codec == "ogg")
diff --git a/VideoNodes/FfmpegBuilderNodes/Audio/FfmpegBuilderAudioAddTrack.cs b/VideoNodes/FfmpegBuilderNodes/Audio/FfmpegBuilderAudioAddTrack.cs
index e4001cfa..772746f8 100644
--- a/VideoNodes/FfmpegBuilderNodes/Audio/FfmpegBuilderAudioAddTrack.cs
+++ b/VideoNodes/FfmpegBuilderNodes/Audio/FfmpegBuilderAudioAddTrack.cs
@@ -363,8 +363,6 @@ 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");