diff --git a/NtApiDotNet/Utilities/Token/ClaimSecurityAttributeBuilder.cs b/NtApiDotNet/Utilities/Token/ClaimSecurityAttributeBuilder.cs
index 22600abfc..003bcd40e 100644
--- a/NtApiDotNet/Utilities/Token/ClaimSecurityAttributeBuilder.cs
+++ b/NtApiDotNet/Utilities/Token/ClaimSecurityAttributeBuilder.cs
@@ -40,7 +40,7 @@ internal struct ClaimSecurityAttributeV1In
     /// <summary>
     /// Builder for a claim security attribute.
     /// </summary>
-    public class ClaimSecurityAttributeBuilder
+    internal class ClaimSecurityAttributeBuilder
     {
         private class WrapperList<T> : List<T>, IList<object>
         {