diff --git a/ATL/AudioData/AudioFileIO.cs b/ATL/AudioData/AudioFileIO.cs
index 4479b860..4b247c36 100644
--- a/ATL/AudioData/AudioFileIO.cs
+++ b/ATL/AudioData/AudioFileIO.cs
@@ -74,9 +74,10 @@ public AudioFileIO(Stream stream, string mimeType, bool readEmbeddedPictures, bo
             bool found = false;
             while (!found && alternate < AudioDataIOFactory.MAX_ALTERNATES)
             {
-                audioData = mimeType.Length > 0 ? AudioDataIOFactory.GetInstance().GetFromMimeType(mimeType, "In-memory", alternate++) : AudioDataIOFactory.GetInstance().GetFromStream(stream);
+                audioData = mimeType.Length > 0 ? AudioDataIOFactory.GetInstance().GetFromMimeType(mimeType, "In-memory", alternate) : AudioDataIOFactory.GetInstance().GetFromStream(stream);
                 audioManager = new AudioDataManager(audioData, stream);
                 found = audioManager.ReadFromFile(readEmbeddedPictures, readAllMetaFrames);
+                alternate++;
             }
             Metadata = getAndCheckMetadata();
         }