diff --git a/server/plugins-available/cron_plugin.inc.php b/server/plugins-available/cron_plugin.inc.php
index f638166d56f903b6c9da9f53d573b2570ba02379..fe3ddfb0b9527bed0f175e22d0e7b9d7e917e8c6 100644
--- a/server/plugins-available/cron_plugin.inc.php
+++ b/server/plugins-available/cron_plugin.inc.php
@@ -140,7 +140,7 @@ class cron_plugin {
             $file_system = explode(" ", $df_output)[0];
             $primitive_root = explode(" ", $df_output)[1];
 
-            if ( $file_system , array('ext2','ext3','ext4') ) {
+            if ( in_array($file_system , array('ext2','ext3','ext4'),true) ) {
               exec('setquota -u '. $username . ' ' . $blocks_soft . ' ' . $blocks_hard . ' 0 0 -a &> /dev/null');
               exec('setquota -T -u '.$username.' 604800 604800 -a &> /dev/null');
             } elseif ($file_system == 'xfs') {