diff --git a/tools/build/mk/OptionalObsoleteFiles.inc b/tools/build/mk/OptionalObsoleteFiles.inc
index e2ca4d2ff8e..b4b7a26a752 100644
--- a/tools/build/mk/OptionalObsoleteFiles.inc
+++ b/tools/build/mk/OptionalObsoleteFiles.inc
@@ -676,6 +676,7 @@ OLD_FILES+=usr/libexec/bsdinstall/distextract
 OLD_FILES+=usr/libexec/bsdinstall/distfetch
 OLD_FILES+=usr/libexec/bsdinstall/docsinstall
 OLD_FILES+=usr/libexec/bsdinstall/entropy
+OLD_FILES+=usr/libexec/bsdinstall/hardening
 OLD_FILES+=usr/libexec/bsdinstall/hostname
 OLD_FILES+=usr/libexec/bsdinstall/jail
 OLD_FILES+=usr/libexec/bsdinstall/keymap