diff --git a/src/AppBundle/Controller/BlogController.php b/src/AppBundle/Controller/BlogController.php
index e4aab377..bea2e036 100644
--- a/src/AppBundle/Controller/BlogController.php
+++ b/src/AppBundle/Controller/BlogController.php
@@ -55,7 +55,7 @@ public function indexAction(Request $request)
 
         // archive information, we have to do this in pure SQL
         $db = \Pimcore\Db::get();
-        $ranges = $db->fetchCol("SELECT DATE_FORMAT(FROM_UNIXTIME(date), '%Y-%c') as ranges FROM object_" . $blogList->classId . " GROUP BY DATE_FORMAT(FROM_UNIXTIME(date), '%b-%Y') ORDER BY ranges ASC");
+        $ranges = $db->fetchCol("SELECT DATE_FORMAT(FROM_UNIXTIME(date), '%Y-%c') as ranges FROM object_" . $blogList->getClassId() . " GROUP BY DATE_FORMAT(FROM_UNIXTIME(date), '%b-%Y') ORDER BY ranges ASC");
         $this->view->archiveRanges = $ranges;
 
         if ($request->get('pdf')) {