diff --git a/llvm/utils/gn/secondary/libcxx/include/BUILD.gn b/llvm/utils/gn/secondary/libcxx/include/BUILD.gn
index b4b3beae3f50b..a8c697601b61f 100644
--- a/llvm/utils/gn/secondary/libcxx/include/BUILD.gn
+++ b/llvm/utils/gn/secondary/libcxx/include/BUILD.gn
@@ -19,8 +19,7 @@ if (current_toolchain == default_toolchain) {
       "_LIBCPP_ABI_FORCE_ITANIUM=",
       "_LIBCPP_ABI_FORCE_MICROSOFT=",
       "_LIBCPP_EXTRA_SITE_DEFINES=",
-      "_LIBCPP_HAS_NO_FILESYSTEM_LIBRARY=",
-      "_LIBCPP_HAS_NO_FSTREAM=",
+      "_LIBCPP_HAS_NO_FILESYSTEM=",
       "_LIBCPP_HAS_NO_THREADS=",
       "_LIBCPP_HAS_NO_MONOTONIC_CLOCK=",
       "_LIBCPP_HAS_MUSL_LIBC=",