diff --git a/llvm/utils/gn/secondary/libcxx/include/BUILD.gn b/llvm/utils/gn/secondary/libcxx/include/BUILD.gn
index 61e2387e026b..32f81da3e872 100644
--- a/llvm/utils/gn/secondary/libcxx/include/BUILD.gn
+++ b/llvm/utils/gn/secondary/libcxx/include/BUILD.gn
@@ -197,6 +197,7 @@ if (current_toolchain == default_toolchain) {
       "__iterator/back_insert_iterator.h",
       "__iterator/common_iterator.h",
       "__iterator/concepts.h",
+      "__iterator/counted_iterator.h",
       "__iterator/data.h",
       "__iterator/default_sentinel.h",
       "__iterator/distance.h",