diff --git a/Shorewall/Perl/Shorewall/Chains.pm b/Shorewall/Perl/Shorewall/Chains.pm
index 44ac205f7..daa0ec528 100644
--- a/Shorewall/Perl/Shorewall/Chains.pm
+++ b/Shorewall/Perl/Shorewall/Chains.pm
@@ -4474,7 +4474,7 @@ sub do_proto( $$$;$ )
 			    fatal_error "An inverted ICMP list may only contain a single type" if $invert;
 			    fatal_error "An ICMP type list is not allowed in this context"     if $restricted;
 			    $types = '';
-			    for my $type ( list_split( $ports, 'ICMP type list' ) ) {
+			    for my $type ( split_list( $ports, 'ICMP type list' ) ) {
 				$types = $types ? join( ',', $types, validate_icmp6( $type ) ) : $type;
 			    }
 			} else {