diff --git a/llvm/utils/gn/secondary/libcxx/include/BUILD.gn b/llvm/utils/gn/secondary/libcxx/include/BUILD.gn
index 0e3a264fc1857..349e57c4ad5b6 100644
--- a/llvm/utils/gn/secondary/libcxx/include/BUILD.gn
+++ b/llvm/utils/gn/secondary/libcxx/include/BUILD.gn
@@ -155,6 +155,7 @@ if (current_toolchain == default_toolchain) {
       "__algorithm/pstl_backends/cpu_backends/transform_reduce.h",
       "__algorithm/pstl_copy.h",
       "__algorithm/pstl_count.h",
+      "__algorithm/pstl_equal.h",
       "__algorithm/pstl_fill.h",
       "__algorithm/pstl_find.h",
       "__algorithm/pstl_for_each.h",