diff --git a/server/lib/classes/cron.d/100-monitor_raid.inc.php b/server/lib/classes/cron.d/100-monitor_raid.inc.php
index 90b9a6150f13713dbb3f332d5a2d1c267c4cd918..3349ffbf444241e21e70b90acf2508808df0666c 100644
--- a/server/lib/classes/cron.d/100-monitor_raid.inc.php
+++ b/server/lib/classes/cron.d/100-monitor_raid.inc.php
@@ -178,7 +178,7 @@ class cronjob_monitor_raid extends cronjob {
 		if($retval === 0) {
 
 			// TYPOWORX FIX | Determine Controler-ID
-			$availableControlers = shell_exec('tw_cli info | grep -Eo "c[0-9]+');
+			$availableControlers = shell_exec('tw_cli info | grep -Eo "c[0-9]+"');
 			$data['output'] = shell_exec('tw_cli info ' . $availableControlers);
 
 			$state = 'ok';