diff --git a/server/lib/classes/monitor_tools.inc.php b/server/lib/classes/monitor_tools.inc.php
index 0f0a172f19c2f34077f33b312fcea655399a7255..6a4804c2d0e11b731c95338bf8d1eb49503083d4 100644
--- a/server/lib/classes/monitor_tools.inc.php
+++ b/server/lib/classes/monitor_tools.inc.php
@@ -151,7 +151,7 @@ class monitor_tools {
 
     //** Email Quota
     public function monitorEmailQuota() {
-        global $conf;
+        global $conf, $app;
 
 		//* Initialize data array
 		$data = array();