diff --git a/src/NzbDrone.Core.Test/ParserTests/ReleaseGroupParserFixture.cs b/src/NzbDrone.Core.Test/ParserTests/ReleaseGroupParserFixture.cs
index 2fd134127..c929c9cab 100644
--- a/src/NzbDrone.Core.Test/ParserTests/ReleaseGroupParserFixture.cs
+++ b/src/NzbDrone.Core.Test/ParserTests/ReleaseGroupParserFixture.cs
@@ -78,6 +78,7 @@ namespace NzbDrone.Core.Test.ParserTests
         [TestCase("Absolute.Power.S02E06.The.House.of.Lords.DVDRip.x264-MaG-Chamele0n", "MaG")]
         [TestCase("The.Walking.Dead.S08E08.1080p.BluRay.x264-ROVERS-4P", "ROVERS")]
         [TestCase("Stranger.Things.S01E02.720p.BluRay.X264-REWARD-4Planet", "REWARD")]
+        [TestCase("Vikings.S01E01.Rites.of.Passage.1080p.BluRay.x264-DON-AlteZachen", "DON")]
         public void should_not_include_repost_in_release_group(string title, string expected)
         {
             Parser.Parser.ParseReleaseGroup(title).Should().Be(expected);
diff --git a/src/NzbDrone.Core/Parser/Parser.cs b/src/NzbDrone.Core/Parser/Parser.cs
index 39dd62458..72e00eec1 100644
--- a/src/NzbDrone.Core/Parser/Parser.cs
+++ b/src/NzbDrone.Core/Parser/Parser.cs
@@ -353,7 +353,7 @@ namespace NzbDrone.Core.Parser
         private static readonly Regex SixDigitAirDateRegex = new Regex(@"(?<=[_.-])(?<airdate>(?<!\d)(?<airyear>[1-9]\d{1})(?<airmonth>[0-1][0-9])(?<airday>[0-3][0-9]))(?=[_.-])",
                                                                         RegexOptions.IgnoreCase | RegexOptions.Compiled);
 
-        private static readonly RegexReplace CleanReleaseGroupRegex = new RegexReplace(@"^(.*?[-._ ](S\d+E\d+)[-._ ])|(-(RP|1|NZBGeek|Obfuscated|Scrambled|sample|Pre|postbot|xpost|Rakuv[a-z0-9]*|WhiteRev|BUYMORE|AsRequested|AlternativeToRequested|GEROV|Z0iDS3N|Chamele0n|4P|4Planet))+$",
+        private static readonly RegexReplace CleanReleaseGroupRegex = new RegexReplace(@"^(.*?[-._ ](S\d+E\d+)[-._ ])|(-(RP|1|NZBGeek|Obfuscated|Scrambled|sample|Pre|postbot|xpost|Rakuv[a-z0-9]*|WhiteRev|BUYMORE|AsRequested|AlternativeToRequested|GEROV|Z0iDS3N|Chamele0n|4P|4Planet|AlteZachen))+$",
                                                                 string.Empty,
                                                                 RegexOptions.IgnoreCase | RegexOptions.Compiled);