unless $meta->isa('Class::MOP::Class');
my $was_immutable = $meta->is_immutable;
- # Need to save immutable_options if they're available from Moose 0.89_02
- my %immutable_options = $meta->can('immutable_options') ? $meta->immutable_options : ();
+ my %immutable_options = $meta->immutable_options;
$meta->make_mutable if $was_immutable;