$dbtype =~ s/\W/_/gi;
my $subclass = "DBIx::Class::Storage::DBI::ODBC::${dbtype}";
- if ($self->load_optional_class($subclass) && !$self->isa($subclass)) {
+ return if $self->isa($subclass);
+
+ if ($self->load_optional_class($subclass)) {
bless $self, $subclass;
$self->_rebless;
}