diff --git a/library/Director/Db.php b/library/Director/Db.php
index bafe6076..eb47d160 100644
--- a/library/Director/Db.php
+++ b/library/Director/Db.php
@@ -33,10 +33,10 @@ class Db extends DbConnection
 
     public function getLastActivityChecksum()
     {
-        if ($this->getDbType() === 'psql') {
-            $select = "SELECT checksum FROM (SELECT * FROM (SELECT 1 AS pos, LOWER(HEX(checksum)) AS checksum FROM director_activity_log ORDER BY change_time DESC LIMIT 1) a UNION SELECT 2 AS pos, '' AS checksum) u ORDER BY pos LIMIT 1";
-        } else {
+        if ($this->getDbType() === 'pgsql') {
             $select = "SELECT checksum FROM (SELECT * FROM (SELECT 1 AS pos, LOWER(ENCODE(checksum, 'hex')) AS checksum FROM director_activity_log ORDER BY change_time DESC LIMIT 1) a UNION SELECT 2 AS pos, '' AS checksum) u ORDER BY pos LIMIT 1";
+        } else {
+            $select = "SELECT checksum FROM (SELECT * FROM (SELECT 1 AS pos, LOWER(HEX(checksum)) AS checksum FROM director_activity_log ORDER BY change_time DESC LIMIT 1) a UNION SELECT 2 AS pos, '' AS checksum) u ORDER BY pos LIMIT 1";
         }
 
         return $this->db()->fetchOne($select);