diff --git a/Aaru.Images/DiskDupe/Helpers.cs b/Aaru.Images/DiskDupe/Helpers.cs
index 156153e46..46815d121 100644
--- a/Aaru.Images/DiskDupe/Helpers.cs
+++ b/Aaru.Images/DiskDupe/Helpers.cs
@@ -77,7 +77,7 @@ public sealed partial class DiskDupe
         for(int i = 0; i < numTracks; i++)
         {
             stream.EnsureRead(buffer, 0, 6);
-            trackMap[i]     = Marshal.ByteArrayToStructureBigEndian<TrackInfo>(buffer);
+            trackMap[i]     = Marshal.ByteArrayToStructureLittleEndian<TrackInfo>(buffer);
             trackOffsets[i] = trackLen * trackMap[i].trackNumber;
         }
 
diff --git a/Aaru.Images/DiskDupe/Structs.cs b/Aaru.Images/DiskDupe/Structs.cs
index 8b436c4b6..c6b36645d 100644
--- a/Aaru.Images/DiskDupe/Structs.cs
+++ b/Aaru.Images/DiskDupe/Structs.cs
@@ -106,12 +106,12 @@ public sealed partial class DiskDupe
     [StructLayout(LayoutKind.Sequential, Pack = 1)]
     struct TrackInfo
     {
-        public readonly byte present; // 1 = present, 0 = absent
-        public readonly byte trackNumber;
-        public readonly byte zero1;
-        public readonly byte zero2;
-        public readonly byte zero3;
-        public readonly byte unknown; // always 1?
+        public byte present; // 1 = present, 0 = absent
+        public byte trackNumber;
+        public byte zero1;
+        public byte zero2;
+        public byte zero3;
+        public byte unknown; // always 1?
     }
 
 #endregion