diff --git a/llvm/utils/gn/secondary/libcxx/include/BUILD.gn b/llvm/utils/gn/secondary/libcxx/include/BUILD.gn
index a39db4f59f7b..15ed25e4fd30 100644
--- a/llvm/utils/gn/secondary/libcxx/include/BUILD.gn
+++ b/llvm/utils/gn/secondary/libcxx/include/BUILD.gn
@@ -308,7 +308,6 @@ if (current_toolchain == default_toolchain) {
       "__support/ibm/xlocale.h",
       "__support/musl/xlocale.h",
       "__support/newlib/xlocale.h",
-      "__support/nuttx/xlocale.h",
       "__support/openbsd/xlocale.h",
       "__support/solaris/floatingpoint.h",
       "__support/solaris/wchar.h",