diff -Nur --no-dereference ezmlm-web-3.3.1.old/ezmlm-web.cgi ezmlm-web-3.3.1/ezmlm-web.cgi
--- ezmlm-web-3.3.1.old/ezmlm-web.cgi	2022-03-20 13:49:24.150000000 -0400
+++ ezmlm-web-3.3.1/ezmlm-web.cgi	2022-03-20 14:04:48.534000000 -0400
@@ -240,13 +240,13 @@
 $HTML_TITLE = '' unless defined($HTML_TITLE);
 
 # check HTML_LINKS
-@HTML_LINKS = () unless defined(@HTML_LINKS);
+@HTML_LINKS = () unless @HTML_LINKS;
 
 # check DEFAULT_INTERFACE_TYPE
 $DEFAULT_INTERFACE_TYPE = 'normal' unless defined($DEFAULT_INTERFACE_TYPE);
 
 # check possible blacklist of interface options (since v3.3)
-@INTERFACE_OPTIONS_BLACKLIST = () unless defined(@INTERFACE_OPTIONS_BLACKLIST);
+@INTERFACE_OPTIONS_BLACKLIST = () unless @INTERFACE_OPTIONS_BLACKLIST;
 
 # check the configured detault location of gnupg keyrings
 $GPG_KEYRING_DEFAULT_LOCATION = ".gnupg"