fix use of uninitialized value

[pve-firewall.git] / src / PVE / API2 / Firewall / Aliases.pm

diff --git a/src/PVE/API2/Firewall/Aliases.pm b/src/PVE/API2/Firewall/Aliases.pm
index 6f421fbe271ff8c75e09fe5533f95b71bd94f0c3..b81dc9d06405417bb55640cb986d34091136287b 100644 (file)
--- a/src/PVE/API2/Firewall/Aliases.pm
+++ b/src/PVE/API2/Firewall/Aliases.pm
@@ -230,7 +230,8 @@ sub register_update_alias {
 
            $aliases->{$name} = $data;
 
-           my $rename = lc($param->{rename});
+           my $rename = $param->{rename};
+           $rename = lc($rename) if $rename;
 
            if ($rename && ($name ne $rename)) {
                raise_param_exc({ name => "alias '$param->{rename}' already exists" })