diff --git a/MediaBrowser.Common.Implementations/IO/CommonFileSystem.cs b/MediaBrowser.Common.Implementations/IO/CommonFileSystem.cs
index 9b3f5a306c..582e05d797 100644
--- a/MediaBrowser.Common.Implementations/IO/CommonFileSystem.cs
+++ b/MediaBrowser.Common.Implementations/IO/CommonFileSystem.cs
@@ -129,7 +129,14 @@ namespace MediaBrowser.Common.Implementations.IO
         /// <summary>
         /// The invalid file name chars
         /// </summary>
+        #if __MonoCS__
+        private static readonly char[] InvalidFileNameChars = new char [41] { '\x00', '\x01', '\x02', '\x03', '\x04', '\x05', '\x06', '\x07',
+            '\x08', '\x09', '\x0A', '\x0B', '\x0C', '\x0D', '\x0E', '\x0F', '\x10', '\x11', '\x12',
+            '\x13', '\x14', '\x15', '\x16', '\x17', '\x18', '\x19', '\x1A', '\x1B', '\x1C', '\x1D',
+            '\x1E', '\x1F', '\x22', '\x3C', '\x3E', '\x7C', ':', '*', '?', '\\', '/' };
+        #else
         private static readonly char[] InvalidFileNameChars = Path.GetInvalidFileNameChars();
+        #endif
 
         /// <summary>
         /// Takes a filename and removes invalid characters