diff --git a/Vocaluxe/Lib/Song/CSong.cs b/Vocaluxe/Lib/Song/CSong.cs
index 1b874dfc..74c799f5 100644
--- a/Vocaluxe/Lib/Song/CSong.cs
+++ b/Vocaluxe/Lib/Song/CSong.cs
@@ -194,6 +194,8 @@ namespace Vocaluxe.Lib.Song
             this.PreviewStart = song.PreviewStart;
 
             this.ShortEnd = song.ShortEnd;
+            this.DuetPart1 = song.DuetPart1;
+            this.DuetPart2 = song.DuetPart2;
 
             this.Encoding = song.Encoding;
             this.Folder = song.Folder;