diff --git a/src/NzbDrone.Core.Test/MediaFiles/MediaInfo/MediaInfoFormatterTests/FormatAudioChannelsFixture.cs b/src/NzbDrone.Core.Test/MediaFiles/MediaInfo/MediaInfoFormatterTests/FormatAudioChannelsFixture.cs
index 7a80c9af4..cc9e06864 100644
--- a/src/NzbDrone.Core.Test/MediaFiles/MediaInfo/MediaInfoFormatterTests/FormatAudioChannelsFixture.cs
+++ b/src/NzbDrone.Core.Test/MediaFiles/MediaInfo/MediaInfoFormatterTests/FormatAudioChannelsFixture.cs
@@ -173,5 +173,21 @@ namespace NzbDrone.Core.Test.MediaFiles.MediaInfo.MediaInfoFormatterTests
 
             MediaInfoFormatter.FormatAudioChannels(mediaInfoModel).Should().Be(5.1m);
         }
+
+        [Test]
+        public void should_warn_unknown_AudioChannelPostions()
+        {
+            var mediaInfoModel = new MediaInfoModel
+            {
+                AudioChannels = 2,
+                AudioChannelPositions = "3/2/0.2.1",
+                AudioChannelPositionsText = null,
+                SchemaRevision = 3
+            };
+
+            MediaInfoFormatter.FormatAudioChannels(mediaInfoModel).Should().Be(2m);
+
+            ExceptionVerification.ExpectedWarns(1);
+        }
     }
 }
diff --git a/src/NzbDrone.Core/MediaFiles/MediaInfo/MediaInfoFormatter.cs b/src/NzbDrone.Core/MediaFiles/MediaInfo/MediaInfoFormatter.cs
index 6ced34684..9ab59d6f6 100644
--- a/src/NzbDrone.Core/MediaFiles/MediaInfo/MediaInfoFormatter.cs
+++ b/src/NzbDrone.Core/MediaFiles/MediaInfo/MediaInfoFormatter.cs
@@ -461,9 +461,12 @@ namespace NzbDrone.Core.MediaFiles.MediaInfo
                         .Sum(s => decimal.Parse(s, CultureInfo.InvariantCulture));
                 }
             }
-            catch (Exception e)
+            catch (Exception)
             {
-                Logger.Warn(e, "Unable to format audio channels using 'AudioChannelPositions', with a value of: '{0}'", audioChannelPositions);
+                Logger.Warn()
+                      .Message("Unable to format audio channels using 'AudioChannelPositions', with a value of: '{0}'", audioChannelPositions)
+                      .WriteSentryWarn("UnknownAudioChannelFormat", mediaInfo.AudioChannels.ToString(), mediaInfo.AudioFormat, audioChannelPositions, mediaInfo.AudioChannelPositionsText)
+                      .Write();
             }
 
             return null;