diff --git a/SabreTools.Models/PKZIP/CentralDirectoryFileHeader.cs b/SabreTools.Models/PKZIP/CentralDirectoryFileHeader.cs
index e77f4af..8aadeed 100644
--- a/SabreTools.Models/PKZIP/CentralDirectoryFileHeader.cs
+++ b/SabreTools.Models/PKZIP/CentralDirectoryFileHeader.cs
@@ -109,7 +109,7 @@ namespace SabreTools.Models.PKZIP
         /// <summary>
         /// Extra field (variable size)
         /// </summary>
-        public byte[]? ExtraField { get; set; }
+        public ExtensibleDataField? ExtraField { get; set; }
 
         /// <summary>
         /// File comment (variable size)