diff --git a/MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs b/MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs
index 17fb42fccc..268549612d 100644
--- a/MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs
+++ b/MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs
@@ -43,7 +43,7 @@ namespace MediaBrowser.Controller.MediaEncoding
         /// The level validation regex.
         /// This regular expression matches strings representing a double.
         /// </summary>
-        public const string LevelValidationRegex = @"-?\d+(?:\.\d+)?";
+        public const string LevelValidationRegex = @"-?[0-9]+(?:\.[0-9]+)?";
 
         private const string _defaultMjpegEncoder = "mjpeg";