diff --git a/llvm/utils/gn/secondary/libcxx/include/BUILD.gn b/llvm/utils/gn/secondary/libcxx/include/BUILD.gn
index f8b41f7fbce0..f036be19ca70 100644
--- a/llvm/utils/gn/secondary/libcxx/include/BUILD.gn
+++ b/llvm/utils/gn/secondary/libcxx/include/BUILD.gn
@@ -171,6 +171,7 @@ if (current_toolchain == default_toolchain) {
       "__iterator/default_sentinel.h",
       "__iterator/incrementable_traits.h",
       "__iterator/iter_move.h",
+      "__iterator/iter_swap.h",
       "__iterator/iterator_traits.h",
       "__iterator/next.h",
       "__iterator/prev.h",