diff --git a/mailpoet/lib/Entities/SendingQueueEntity.php b/mailpoet/lib/Entities/SendingQueueEntity.php
index f4dcc4e1b0..0ef02e4295 100644
--- a/mailpoet/lib/Entities/SendingQueueEntity.php
+++ b/mailpoet/lib/Entities/SendingQueueEntity.php
@@ -226,7 +226,7 @@ class SendingQueueEntity {
 
   public function toArray(): array {
     if (!$this->getTask() instanceof ScheduledTaskEntity) {
-      throw new \RuntimeException('Invalid state. SendingQueue has ScheduledTask associated.');
+      throw new \RuntimeException('Invalid state. SendingQueue has no ScheduledTask associated.');
     }
 
     return [