diff --git a/src/NzbDrone.Core/Indexers/XmlCleaner.cs b/src/NzbDrone.Core/Indexers/XmlCleaner.cs
index 49a462eec..91d0ea3b1 100644
--- a/src/NzbDrone.Core/Indexers/XmlCleaner.cs
+++ b/src/NzbDrone.Core/Indexers/XmlCleaner.cs
@@ -8,7 +8,7 @@ public static class XmlCleaner
     {
 
         private static readonly Regex ReplaceEntitiesRegex = new Regex("&[a-z]+;", RegexOptions.Compiled | RegexOptions.IgnoreCase);
-        private static readonly Regex ReplaceUnicodeRegex = new Regex(@"[^\x09\x0A\x0D\x20-\xD7FF\xE000-\xFFFD\x10000-x10FFFF]", RegexOptions.Compiled | RegexOptions.IgnoreCase);
+        private static readonly Regex ReplaceUnicodeRegex = new Regex(@"[^\x09\x0A\x0D\u0020-\uD7FF\uE000-\uFFFD]", RegexOptions.Compiled | RegexOptions.IgnoreCase);
 
         public static string ReplaceEntities(string content)
         {