) {
my $time_period;
my $date_style = $conf->config('cust_bill-line_item-date_style');
- if ( $date_style eq 'month_of' ) {
+ if ( defined($date_style) && $date_style eq 'month_of' ) {
$time_period = time2str('The month of %B', $cust_bill_pkg->sdate);
} else {
$time_period = time2str($date_format, $cust_bill_pkg->sdate).