diff --git a/BurnOutSharp/FileType/Executable.cs b/BurnOutSharp/FileType/Executable.cs
index 20c8dcd7..79893fb7 100644
--- a/BurnOutSharp/FileType/Executable.cs
+++ b/BurnOutSharp/FileType/Executable.cs
@@ -63,6 +63,11 @@ namespace BurnOutSharp.FileType
             if (!string.IsNullOrWhiteSpace(protection))
                 protections.Add(protection);
 
+            // 21Studios Online Activation
+            protection = TwentyOneStudios.CheckContents(fileContent, includePosition);
+            if (!string.IsNullOrWhiteSpace(protection))
+                protections.Add(protection);
+
             // ActiveMARK
             protection = ActiveMARK.CheckContents(fileContent, includePosition);
             if (!string.IsNullOrWhiteSpace(protection))