diff --git a/SabreTools.Serialization/Models/PlayStation4/AppPkgHeader.cs b/SabreTools.Serialization/Models/PlayStation4/AppPkgHeader.cs
index a93c2244..513f02dc 100644
--- a/SabreTools.Serialization/Models/PlayStation4/AppPkgHeader.cs
+++ b/SabreTools.Serialization/Models/PlayStation4/AppPkgHeader.cs
@@ -76,7 +76,7 @@ namespace SabreTools.Data.Models.PlayStation4
         /// PKG Content ID
         /// </summary>
         [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 0x24)]
-        public string? ContentID;
+        public string ContentID;
 
         /// <summary>
         /// PKG Content Padding (Zeroes)