diff --git a/lib/lib_ciss_upgrades.sh b/lib/lib_ciss_upgrades.sh
index b5ab26e..221e4f8 100644
--- a/lib/lib_ciss_upgrades.sh
+++ b/lib/lib_ciss_upgrades.sh
@@ -40,5 +40,5 @@ ciss_upgrades() {
 }
 ### Prevents accidental 'unset -f'.
 # shellcheck disable=SC2034
-readonly -f lb_ciss_upgrade
+readonly -f ciss_upgrades
 # vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh