1 files changed, 7 insertions, 0 deletions
diff --git a/MediaBrowser.Controller/Entities/Audio/Audio.cs b/MediaBrowser.Controller/Entities/Audio/Audio.cs
index 6326bbd4f..1af55a389 100644
--- a/MediaBrowser.Controller/Entities/Audio/Audio.cs
+++ b/MediaBrowser.Controller/Entities/Audio/Audio.cs
@@ -5,9 +5,11 @@ using MediaBrowser.Model.Entities;
 using MediaBrowser.Model.MediaInfo;
 using System;
 using System.Collections.Generic;
+using System.Globalization;
 using System.Linq;
 using System.Runtime.Serialization;
 using System.Threading;
+using MediaBrowser.Common.Extensions;
 using MediaBrowser.Controller.Channels;
 
 namespace MediaBrowser.Controller.Entities.Audio
@@ -266,6 +268,11 @@ namespace MediaBrowser.Controller.Entities.Audio
                 Size = i.Size
             };
 
+            if (info.Protocol == MediaProtocol.File)
+            {
+                info.ETag = i.DateModified.Ticks.ToString(CultureInfo.InvariantCulture).GetMD5().ToString("N");
+            }
+
             if (string.IsNullOrEmpty(info.Container))
             {
                 if (!string.IsNullOrWhiteSpace(i.Path) && locationType != LocationType.Remote && locationType != LocationType.Virtual)