diff --git a/src/newsletter.php b/src/newsletter.php
index 00402a5..0bc7d2c 100644
--- a/src/newsletter.php
+++ b/src/newsletter.php
@@ -844,7 +844,7 @@
 			
 			// get list of available job ids
 			$newsletter_db = new Dat("./.dat/newsletter", Dat::MODE_READ);
-			$job_id_list = array_keys($newsletter_db->get("queue"));
+			$job_id_list = array_keys($newsletter_db->get("queue") ?? []);
 			$newsletter_db->close();