diff --git a/llvm/utils/gn/secondary/libcxx/include/BUILD.gn b/llvm/utils/gn/secondary/libcxx/include/BUILD.gn
index 44c9b052bea0..7c07e1cb44c1 100644
--- a/llvm/utils/gn/secondary/libcxx/include/BUILD.gn
+++ b/llvm/utils/gn/secondary/libcxx/include/BUILD.gn
@@ -487,8 +487,33 @@ if (current_toolchain == default_toolchain) {
       "__threading_support",
       "__tree",
       "__tuple",
+      "__type_traits/add_pointer.h",
+      "__type_traits/conditional.h",
+      "__type_traits/decay.h",
+      "__type_traits/enable_if.h",
       "__type_traits/integral_constant.h",
+      "__type_traits/is_array.h",
+      "__type_traits/is_base_of.h",
       "__type_traits/is_callable.h",
+      "__type_traits/is_const.h",
+      "__type_traits/is_convertible.h",
+      "__type_traits/is_floating_point.h",
+      "__type_traits/is_function.h",
+      "__type_traits/is_integral.h",
+      "__type_traits/is_member_function_pointer.h",
+      "__type_traits/is_member_object_pointer.h",
+      "__type_traits/is_null_pointer.h",
+      "__type_traits/is_reference.h",
+      "__type_traits/is_reference_wrapper.h",
+      "__type_traits/is_referenceable.h",
+      "__type_traits/is_same.h",
+      "__type_traits/is_void.h",
+      "__type_traits/is_volatile.h",
+      "__type_traits/remove_const.h",
+      "__type_traits/remove_cv.h",
+      "__type_traits/remove_extent.h",
+      "__type_traits/remove_reference.h",
+      "__type_traits/remove_volatile.h",
       "__undef_macros",
       "__utility/as_const.h",
       "__utility/auto_cast.h",