diff --git a/src/NzbDrone.Core/Organizer/FileNameBuilder.cs b/src/NzbDrone.Core/Organizer/FileNameBuilder.cs
index 115fa5d27..f527dd334 100644
--- a/src/NzbDrone.Core/Organizer/FileNameBuilder.cs
+++ b/src/NzbDrone.Core/Organizer/FileNameBuilder.cs
@@ -67,7 +67,7 @@ public class FileNameBuilder : IBuildFileNames
 
         public static readonly Regex AirDateRegex = new Regex(@"\{Air(\s|\W|_)Date\}", RegexOptions.Compiled | RegexOptions.IgnoreCase);
 
-        public static readonly Regex SeriesTitleRegex = new Regex(@"(?<token>\{(?:Series)(?<separator>[- ._])(Clean)?Title(The)?(Without)?(Year)?\})",
+        public static readonly Regex SeriesTitleRegex = new Regex(@"(?<token>\{(?:Series)(?<separator>[- ._])(Clean)?Title(The)?(Without)?(Year)?(?::(?<customFormat>[0-9-]+))?\})",
                                                                             RegexOptions.Compiled | RegexOptions.IgnoreCase);
 
         private static readonly Regex FileNameCleanupRegex = new Regex(@"([- ._])(\1)+", RegexOptions.Compiled);