diff --git a/src/NzbDrone.Core.Test/MediaFiles/MovieImport/Specifications/NotMultiPartSpecificationFixture.cs b/src/NzbDrone.Core.Test/MediaFiles/MovieImport/Specifications/NotMultiPartSpecificationFixture.cs
index 7331605499..0a91afe98f 100644
--- a/src/NzbDrone.Core.Test/MediaFiles/MovieImport/Specifications/NotMultiPartSpecificationFixture.cs
+++ b/src/NzbDrone.Core.Test/MediaFiles/MovieImport/Specifications/NotMultiPartSpecificationFixture.cs
@@ -54,6 +54,17 @@ public void should_be_accepted_for_legitimate_files(object[] paths)
             @"C:\Test\Downloaded\Bad Boys (2006) part1.mkv",
             @"C:\Test\Downloaded\Bad Boys (2006) part2.mkv"
         })]
+
+        [TestCase(new object[]
+        {
+            @"C:\Test\Downloaded\Bad Boys (2006) pt1.mkv",
+            @"C:\Test\Downloaded\Bad Boys (2006) pt2.mkv"
+        })]
+        [TestCase(new object[]
+        {
+            @"C:\Test\Downloaded\Bad Boys (2006) P1.mkv",
+            @"C:\Test\Downloaded\Bad Boys (2006) P2.mkv"
+        })]
         [TestCase(new object[]
         {
             @"C:\Test\Downloaded\blah blah - cd 1.mvk",
diff --git a/src/NzbDrone.Core/MediaFiles/MovieImport/Specifications/NotMultiPartSpecification.cs b/src/NzbDrone.Core/MediaFiles/MovieImport/Specifications/NotMultiPartSpecification.cs
index a6694a8bca..ead4680cc1 100644
--- a/src/NzbDrone.Core/MediaFiles/MovieImport/Specifications/NotMultiPartSpecification.cs
+++ b/src/NzbDrone.Core/MediaFiles/MovieImport/Specifications/NotMultiPartSpecification.cs
@@ -12,8 +12,8 @@ public class NotMultiPartSpecification : IImportDecisionEngineSpecification
     {
         private static readonly Regex[] MovieMultiPartRegex = new[]
         {
-            new Regex(@"(?<!^)(?<identifier>[ _.-]*(?:cd|dvd|p(?:ar)?t|dis[ck])[ _.-]*[0-9]+)", RegexOptions.Compiled | RegexOptions.IgnoreCase),
-            new Regex(@"(?<!^)(?<identifier>[ _.-]*(?:cd|dvd|p(?:ar)?t|dis[ck])[ _.-]*[a-d]+)", RegexOptions.Compiled | RegexOptions.IgnoreCase),
+            new Regex(@"(?<!^)(?<identifier>[ _.-]*(?:cd|dvd|p(?:(?:ar)?t)?|dis[ck])[ _.-]*[0-9]+)", RegexOptions.Compiled | RegexOptions.IgnoreCase),
+            new Regex(@"(?<!^)(?<identifier>[ _.-]*(?:cd|dvd|p(?:(?:ar)?t)?|dis[ck])[ _.-]*[a-d]+)", RegexOptions.Compiled | RegexOptions.IgnoreCase),
         };
 
         private readonly IDiskProvider _diskProvider;