diff --git a/DiscImageChef.Filesystems/ISO9660/Structs/CDi.cs b/DiscImageChef.Filesystems/ISO9660/Structs/CDi.cs
index f46f83235..135a20030 100644
--- a/DiscImageChef.Filesystems/ISO9660/Structs/CDi.cs
+++ b/DiscImageChef.Filesystems/ISO9660/Structs/CDi.cs
@@ -175,7 +175,8 @@ namespace DiscImageChef.Filesystems.ISO9660
         [StructLayout(LayoutKind.Sequential, Pack = 1)]
         struct CdiSystemArea
         {
-            public readonly uint          owner;
+            public readonly ushort        group;
+            public readonly ushort        owner;
             public readonly CdiAttributes attributes;
             public readonly ushort        reserved1;
             public readonly byte          file_no;