diff --git a/phpBB/includes/acp/acp_permissions.php b/phpBB/includes/acp/acp_permissions.php
index d65a9cbb9e..3d4c256a3f 100644
--- a/phpBB/includes/acp/acp_permissions.php
+++ b/phpBB/includes/acp/acp_permissions.php
@@ -732,7 +732,7 @@ class acp_permissions
 		// Remove users who are now moderators or admins from everyones foes list
 		if ($permission_type == 'm_' || $permission_type == 'a_')
 		{
-			update_foes($group_id, $user_id);
+			phpbb_update_foes($db, $auth, $group_id, $user_id);
 		}
 
 		$this->log_action($mode, 'add', $permission_type, $ug_type, $ug_id, $forum_id);
@@ -800,7 +800,7 @@ class acp_permissions
 		// Remove users who are now moderators or admins from everyones foes list
 		if ($permission_type == 'm_' || $permission_type == 'a_')
 		{
-			update_foes($group_id, $user_id);
+			phpbb_update_foes($db, $auth, $group_id, $user_id);
 		}
 
 		$this->log_action($mode, 'add', $permission_type, $ug_type, $ug_ids, $forum_ids);
diff --git a/phpBB/includes/functions_admin.php b/phpBB/includes/functions_admin.php
index 571f1acd1d..e8dd55813b 100644
--- a/phpBB/includes/functions_admin.php
+++ b/phpBB/includes/functions_admin.php
@@ -2744,12 +2744,16 @@ function view_log($mode, &$log, &$log_count, $limit = 0, $offset = 0, $forum_id
 }
 
 /**
-* Update foes - remove moderators and administrators from foe lists...
+* Removes moderators and administrators from foe lists.
+*
+* @param phpbb_db_driver $db Database connection
+* @param phpbb_auth $auth Authentication object
+* @param array|bool $group_id If an array, remove all members of this group from foe lists, or false to ignore
+* @param array|bool $user_id If an array, remove this user from foe lists, or false to ignore
+* @return null
 */
-function update_foes($group_id = false, $user_id = false)
+function phpbb_update_foes($db, $auth, $group_id = false, $user_id = false)
 {
-	global $db, $auth;
-
 	// update foes for some user
 	if (is_array($user_id) && sizeof($user_id))
 	{
diff --git a/phpBB/includes/functions_user.php b/phpBB/includes/functions_user.php
index 2d6c15a5b1..a50d5175fe 100644
--- a/phpBB/includes/functions_user.php
+++ b/phpBB/includes/functions_user.php
@@ -3730,12 +3730,12 @@ function group_update_listings($group_id)
 
 	if ($mod_permissions || $admin_permissions)
 	{
-		if (!function_exists('update_foes'))
+		if (!function_exists('phpbb_update_foes'))
 		{
 			global $phpbb_root_path, $phpEx;
 			include($phpbb_root_path . 'includes/functions_admin.' . $phpEx);
 		}
-		update_foes(array($group_id));
+		phpbb_update_foes($db, $auth, array($group_id));
 	}
 }