diff --git a/AudioConverterFileConverter/AppDelegate.cs b/AudioConverterFileConverter/AppDelegate.cs
index 45600c88..e66304be 100644
--- a/AudioConverterFileConverter/AppDelegate.cs
+++ b/AudioConverterFileConverter/AppDelegate.cs
@@ -99,7 +99,7 @@ namespace AudioConverterFileConverter
             // our default category -- we change this for conversion and playback appropriately
             try
             {
-                session.SetCategory(new NSString("AudioSessionCategory.SoloAmbientSound"));
+                session.SetCategory (AVAudioSessionCategory.SoloAmbient);
             }
             catch
             {