diff --git a/cronjobs.php b/cronjobs.php
index 0ca7f26..4bc5023 100755
--- a/cronjobs.php
+++ b/cronjobs.php
@@ -525,7 +525,7 @@ public function addNewModulesTasks()
             $id_module = (int)$cron['id_module'];
             $module = Module::getInstanceById((int)$cron['id_module']);
 
-            if ($module == false) {
+            if ($module == false && isset($cron['id_cronjob'])) {
                 Db::getInstance()->execute('DELETE FROM '._DB_PREFIX_.bqSQL($this->name).' WHERE `id_cronjob` = \''.(int)$cron['id_cronjob'].'\'');
                 break;
             }