my %attributes = %{ $::form->{time_recording} || {} };
if ($self->use_duration) {
- if ($::form->{duration_h} || $::form->{duration_m}) {
+ if (exists $::form->{duration_h} || exists $::form->{duration_m}) {
$attributes{duration} = _round_number(_parse_number($::form->{duration_h}) * 60 + _parse_number($::form->{duration_m}), 0);
}