diff --git a/app/Utils/Traits/MakesReminders.php b/app/Utils/Traits/MakesReminders.php
index 232c15525d..119351ba4d 100644
--- a/app/Utils/Traits/MakesReminders.php
+++ b/app/Utils/Traits/MakesReminders.php
@@ -82,7 +82,7 @@ trait MakesReminders
 
     private function checkEndlessReminder($last_sent_date, $endless_reminder_frequency_id): bool
     {
-        if(!$last_sent_date)
+        if(is_null($last_sent_date) || !$last_sent_date)
             return false;
         
         if (Carbon::now()->startOfDay()->eq($this->addTimeInterval($last_sent_date, $endless_reminder_frequency_id))) {