diff --git a/llvm/utils/gn/secondary/libcxx/include/BUILD.gn b/llvm/utils/gn/secondary/libcxx/include/BUILD.gn
index 3822f93840ba6..5bbe98905875e 100644
--- a/llvm/utils/gn/secondary/libcxx/include/BUILD.gn
+++ b/llvm/utils/gn/secondary/libcxx/include/BUILD.gn
@@ -483,6 +483,12 @@ if (current_toolchain == default_toolchain) {
       "__memory/uses_allocator.h",
       "__memory/uses_allocator_construction.h",
       "__memory/voidify.h",
+      "__memory_resource/memory_resource.h",
+      "__memory_resource/monotonic_buffer_resource.h",
+      "__memory_resource/polymorphic_allocator.h",
+      "__memory_resource/pool_options.h",
+      "__memory_resource/synchronized_pool_resource.h",
+      "__memory_resource/unsynchronized_pool_resource.h",
       "__mutex_base",
       "__node_handle",
       "__numeric/accumulate.h",
diff --git a/llvm/utils/gn/secondary/libcxx/src/BUILD.gn b/llvm/utils/gn/secondary/libcxx/src/BUILD.gn
index f7bd1b2b3339b..5dd6aaa5c44c9 100644
--- a/llvm/utils/gn/secondary/libcxx/src/BUILD.gn
+++ b/llvm/utils/gn/secondary/libcxx/src/BUILD.gn
@@ -148,6 +148,7 @@ cxx_sources = [
   "legacy_pointer_safety.cpp",
   "locale.cpp",
   "memory.cpp",
+  "memory_resource.cpp",
   "mutex.cpp",
   "mutex_destructor.cpp",
   "new.cpp",