diff --git a/SabreTools.Models/TAR/Header.cs b/SabreTools.Models/TAR/Header.cs
index 5f9fd31..b4edfe8 100644
--- a/SabreTools.Models/TAR/Header.cs
+++ b/SabreTools.Models/TAR/Header.cs
@@ -26,7 +26,7 @@ namespace SabreTools.Models.TAR
         [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 8)]
         public byte[]? UID;
 
-         /// <summary>
+        /// <summary>
         /// Owner's numeric group ID
         /// </summary>
         /// <remarks>Octal string representation</remarks>
@@ -65,6 +65,8 @@ namespace SabreTools.Models.TAR
         [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 100)]
         public string? LinkName;
 
+        #region USTAR Extension
+
         /// <summary>
         /// UStar indicator, "ustar", then NUL
         /// </summary>
@@ -109,5 +111,7 @@ namespace SabreTools.Models.TAR
         /// <remarks>155 bytes</remarks>
         [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 155)]
         public string? Prefix;
+
+        #endregion
     }
 }
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