diff --git a/llvm/utils/gn/secondary/libcxx/include/BUILD.gn b/llvm/utils/gn/secondary/libcxx/include/BUILD.gn
index f47c19ef477db..5a0cd50756422 100644
--- a/llvm/utils/gn/secondary/libcxx/include/BUILD.gn
+++ b/llvm/utils/gn/secondary/libcxx/include/BUILD.gn
@@ -79,6 +79,7 @@ if (current_toolchain == default_toolchain) {
       "__memory/base.h",
       "__memory/pointer_traits.h",
       "__memory/temporary_buffer.h",
+      "__memory/uninitialized_algorithms.h",
       "__memory/unique_ptr.h",
       "__memory/utilities.h",
       "__mutex_base",