diff --git a/src/NzbDrone.Core.Test/ParserTests/QualityParserFixture.cs b/src/NzbDrone.Core.Test/ParserTests/QualityParserFixture.cs
index aca9cf66d..84867b855 100644
--- a/src/NzbDrone.Core.Test/ParserTests/QualityParserFixture.cs
+++ b/src/NzbDrone.Core.Test/ParserTests/QualityParserFixture.cs
@@ -221,6 +221,7 @@ public void should_parse_webrip2160p_quality(string title, bool proper)
         [TestCase("John.Carpenter.Live.Retrospective.2016.2018.720p.MBluRay.x264-CRUELTY.mkv", false)]
         [TestCase("Heart.Live.In.Atlantic.City.2019.720p.MBLURAY.x264-MBLURAYFANS.mkv", false)]
         [TestCase("Opeth.Garden.Of.The.Titans.Live.At.Red.Rocks.Amphitheatre.2017.720p.MBluRay.x264-TREBLE.mkv", false)]
+        [TestCase("Justified.Stagione.2.Parte.2.ITA-ENG.720p.BDMux.DD5.1.x264-DarkSideMux", false)]
         public void should_parse_bluray720p_quality(string title, bool proper)
         {
             ParseAndVerifyQuality(title, Source.BLURAY, proper, Resolution.R720p);
diff --git a/src/NzbDrone.Core/Parser/QualityParser.cs b/src/NzbDrone.Core/Parser/QualityParser.cs
index 6385df78c..769e5f3c6 100644
--- a/src/NzbDrone.Core/Parser/QualityParser.cs
+++ b/src/NzbDrone.Core/Parser/QualityParser.cs
@@ -15,7 +15,7 @@ public class QualityParser
         private static readonly Logger Logger = NzbDroneLogger.GetLogger(typeof(QualityParser));
 
         private static readonly Regex SourceRegex = new Regex(@"\b(?:
-                                                                (?<bluray>M?BluRay|Blu-Ray|HDDVD|BD(?!$)|BDISO|BD25|BD50|BR.?DISK)|
+                                                                (?<bluray>M?BluRay|Blu-Ray|HDDVD|BD(?!$)|BDISO|BDMux|BD25|BD50|BR.?DISK)|
                                                                 (?<webdl>WEB[-_. ]DL|WEBDL|AmazonHD|iTunesHD|MaxdomeHD|NetflixU?HD|WebHD|[. ]WEB[. ](?:[xh]26[45]|DDP?5[. ]1)|[. ](?-i:WEB)$|\d+0p(?:[-. ]AMZN)?[-. ]WEB[-. ]|WEB-DLMux|\b\s\/\sWEB\s\/\s\b|AMZN[. ]WEB[. ])|
                                                                 (?<webrip>WebRip|Web-Rip|WEBMux)|
                                                                 (?<hdtv>HDTV)|