diff --git a/tools/cpp/unix_cc_toolchain_config.bzl b/tools/cpp/unix_cc_toolchain_config.bzl
index 4fbeaafb86107b..ed5d2d3659769b 100644
--- a/tools/cpp/unix_cc_toolchain_config.bzl
+++ b/tools/cpp/unix_cc_toolchain_config.bzl
@@ -1337,7 +1337,7 @@ def _impl(ctx):
         flag_sets = [
             flag_set(
                 actions = all_compile_actions + all_link_actions,
-                flag_groups = [flag_group(flags = ["-mmacos-version-min={}".format(_target_os_version(ctx))])],
+                flag_groups = [flag_group(flags = ["-mmacosx-version-min={}".format(_target_os_version(ctx))])],
             ),
         ],
     )