diff --git a/llvm/utils/gn/secondary/libcxx/include/BUILD.gn b/llvm/utils/gn/secondary/libcxx/include/BUILD.gn
index 278c29c766ddb5..c20d2aa0336906 100644
--- a/llvm/utils/gn/secondary/libcxx/include/BUILD.gn
+++ b/llvm/utils/gn/secondary/libcxx/include/BUILD.gn
@@ -1175,6 +1175,7 @@ if (current_toolchain == default_toolchain) {
       "__locale_dir/support/freebsd.h",
       "__locale_dir/support/fuchsia.h",
       "__locale_dir/support/linux.h",
+      "__locale_dir/support/netbsd.h",
       "__locale_dir/support/no_locale/characters.h",
       "__locale_dir/support/no_locale/strtonum.h",
       "__locale_dir/support/windows.h",