diff --git a/llvm/utils/gn/secondary/libcxx/include/BUILD.gn b/llvm/utils/gn/secondary/libcxx/include/BUILD.gn
index d6f8ac896e3d..b01018c38e32 100644
--- a/llvm/utils/gn/secondary/libcxx/include/BUILD.gn
+++ b/llvm/utils/gn/secondary/libcxx/include/BUILD.gn
@@ -141,6 +141,7 @@ if (current_toolchain == default_toolchain) {
       "__algorithm/ranges_all_of.h",
       "__algorithm/ranges_any_of.h",
       "__algorithm/ranges_binary_search.h",
+      "__algorithm/ranges_clamp.h",
       "__algorithm/ranges_copy.h",
       "__algorithm/ranges_copy_backward.h",
       "__algorithm/ranges_copy_if.h",