diff --git a/llvm/utils/gn/secondary/libcxx/include/BUILD.gn b/llvm/utils/gn/secondary/libcxx/include/BUILD.gn
index c56ae58192957..d914c203ae406 100644
--- a/llvm/utils/gn/secondary/libcxx/include/BUILD.gn
+++ b/llvm/utils/gn/secondary/libcxx/include/BUILD.gn
@@ -479,6 +479,7 @@ if (current_toolchain == default_toolchain) {
       "__iterator/readable_traits.h",
       "__iterator/reverse_access.h",
       "__iterator/reverse_iterator.h",
+      "__iterator/segmented_iterator.h",
       "__iterator/size.h",
       "__iterator/sortable.h",
       "__iterator/unreachable_sentinel.h",