diff --git a/interface/web/monitor/show_sys_state.php b/interface/web/monitor/show_sys_state.php
index 54d2de5ee5a5410c5918c4f1a2f509ee94ef5bf7..904519f892e61a97173aeba39bad344117f01856 100644
--- a/interface/web/monitor/show_sys_state.php
+++ b/interface/web/monitor/show_sys_state.php
@@ -186,7 +186,7 @@ function _getServerState($serverId, $serverName) {
 	$messages = array();
 
 	/** The Result of the function */
-	$res = '';
+	$res = array();
 
 	/*
      * Get all monitoring-data from the server and process then