diff --git a/llvm/utils/gn/secondary/libcxx/include/BUILD.gn b/llvm/utils/gn/secondary/libcxx/include/BUILD.gn
index 700f01b9c5c74..5a928fda16665 100644
--- a/llvm/utils/gn/secondary/libcxx/include/BUILD.gn
+++ b/llvm/utils/gn/secondary/libcxx/include/BUILD.gn
@@ -153,6 +153,7 @@ if (current_toolchain == default_toolchain) {
       "__algorithm/pstl_backends/cpu_backends/for_each.h",
       "__algorithm/pstl_backends/cpu_backends/serial.h",
       "__algorithm/pstl_backends/cpu_backends/transform.h",
+      "__algorithm/pstl_copy.h",
       "__algorithm/pstl_fill.h",
       "__algorithm/pstl_find.h",
       "__algorithm/pstl_for_each.h",