diff --git a/MediaBrowser.MediaEncoding/Subtitles/SubtitleEditParser.cs b/MediaBrowser.MediaEncoding/Subtitles/SubtitleEditParser.cs
index c94242b4b9..e95cb12d2c 100644
--- a/MediaBrowser.MediaEncoding/Subtitles/SubtitleEditParser.cs
+++ b/MediaBrowser.MediaEncoding/Subtitles/SubtitleEditParser.cs
@@ -102,7 +102,7 @@ namespace MediaBrowser.MediaEncoding.Subtitles
 
             foreach (var type in assembly.GetTypes())
             {
-                if (!type.IsSubclassOf(typeof(SubtitleFormat)))
+                if (!type.IsSubclassOf(typeof(SubtitleFormat)) || type.IsAbstract)
                 {
                     continue;
                 }