diff --git a/apps/updatenotification/lib/Command/Check.php b/apps/updatenotification/lib/Command/Check.php
index bca89adaa54..c6109e44e6a 100644
--- a/apps/updatenotification/lib/Command/Check.php
+++ b/apps/updatenotification/lib/Command/Check.php
@@ -1,5 +1,26 @@
 <?php
 
+/**
+ *
+ * @copyright Copyright (c) 2018, Tobia De Koninck (tobia@ledfan.be)
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
 namespace OCA\UpdateNotification\Command;
 
 use OC\App\AppManager;
@@ -43,7 +64,7 @@ class Check extends Command {
 	protected function execute(InputInterface $input, OutputInterface $output) {
 		// Server
 		$r = $this->updateChecker->getUpdateState();
-		if ($r['updateAvailable']) {
+		if (isset($r['updateAvailable']) && $r['updateAvailable']) {
 			$output->writeln($r['updateVersion'] . ' is available. Get more information on how to update at '. $r['updateLink'] . '.');
 		}