From 99dfd7f84d3ca6d7f4353687a6754a8488e51c3a Mon Sep 17 00:00:00 2001
From: Richard Hansen <rhansen@rhansen.org>
Date: Fri, 21 Jun 2024 21:43:25 -0400
Subject: [PATCH] Don't assume that `--use` is defined

---
 ddclient.in | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/ddclient.in b/ddclient.in
index 38481a3..e3827f8 100755
--- a/ddclient.in
+++ b/ddclient.in
@@ -1323,7 +1323,7 @@ sub main {
 
         fatal("invalid argument '--use=%s'; possible values are:\n%s",
               $opt{'use'}, join("\n", ip_strategies_usage()))
-            unless exists $ip_strategies{lc opt('use')};
+            if defined(opt('use')) && !$ip_strategies{lc(opt('use'))};
         if (defined($opt{'usev6'})) {
             usage("invalid argument '--usev6=%s'; possible values are:\n%s",
                   $opt{'usev6'}, join("\n", ipv6_strategies_usage()))