diff --git a/includes/device-groups.inc.php b/includes/device-groups.inc.php
index 1c07b855f3..441a3c3c13 100644
--- a/includes/device-groups.inc.php
+++ b/includes/device-groups.inc.php
@@ -236,7 +236,6 @@ function RunGroupMacros($rule,$x=1) {
  */
 function UpdateGroupsForDevice($device_id)
 {
-    global $debug;
     $queried_groups = QueryGroupsFromDevice($device_id);
     $db_groups = GetGroupsFromDevice($device_id);