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-rw-r--r--program/include/main.inc5
1 files changed, 3 insertions, 2 deletions
diff --git a/program/include/main.inc b/program/include/main.inc
index c4ea73e38..d75921f3a 100644
--- a/program/include/main.inc
+++ b/program/include/main.inc
@@ -76,8 +76,9 @@ function get_sequence_name($sequence)
if (!empty($opt))
{
$db = &rcmail::get_instance()->db;
-
- if ($db->db_provider=='pgsql' && is_a($db, 'rcube_mdb2'))
+ $dbclass = 'rcube_mdb2';
+
+ if ($db->db_provider=='pgsql' && ($db instanceof $dbclass))
{
$db->db_handle->setOption('disable_smart_seqname', true);
$db->db_handle->setOption('seqname_format', '%s');