diff --git a/BurnOutSharp.Models/NewExecutable/Enums.cs b/BurnOutSharp.Models/NewExecutable/Enums.cs
index 8d6f8f6b..a1c71bda 100644
--- a/BurnOutSharp.Models/NewExecutable/Enums.cs
+++ b/BurnOutSharp.Models/NewExecutable/Enums.cs
@@ -121,6 +121,35 @@ namespace BurnOutSharp.Models.NewExecutable
         BOSS = 0x05,
     }
 
+    [Flags]
+    public enum OS2Flag : byte
+    {
+        /// <summary>
+        /// Long filename support
+        /// </summary>
+        LongFilenameSupport = 0x01,
+
+        /// <summary>
+        /// 2.x protected mode
+        /// </summary>
+        ProtectedMode = 0x02,
+
+        /// <summary>
+        /// 2.x proportional fonts
+        /// </summary>
+        ProportionalFonts = 0x04,
+
+        /// <summary>
+        /// Executable has gangload area
+        /// </summary>
+        HasGangload = 0x08,
+
+        /// <summary>
+        /// Unknown
+        /// </summary>
+        Unknown = 0xF0,
+    }
+
     [Flags]
     public enum SegmentTableEntryFlag : ushort
     {
diff --git a/BurnOutSharp.Models/NewExecutable/ExecutableHeader.cs b/BurnOutSharp.Models/NewExecutable/ExecutableHeader.cs
index 84ad631d..7b6de0ab 100644
--- a/BurnOutSharp.Models/NewExecutable/ExecutableHeader.cs
+++ b/BurnOutSharp.Models/NewExecutable/ExecutableHeader.cs
@@ -168,7 +168,7 @@ namespace BurnOutSharp.Models.NewExecutable
         /// <summary>
         /// Other OS/2 flags
         /// </summary>
-        public byte AdditionalFlags;
+        public OS2Flag AdditionalFlags;
         
         /// <summary>
         /// Offset to return thunks or start of gangload area