diff --git a/app/Providers/EventServiceProvider.php b/app/Providers/EventServiceProvider.php
index 57afa3f7e5fe..d2b7e232acfa 100644
--- a/app/Providers/EventServiceProvider.php
+++ b/app/Providers/EventServiceProvider.php
@@ -60,6 +60,7 @@ use App\Events\Payment\PaymentWasRefunded;
 use App\Events\Payment\PaymentWasRestored;
 use App\Events\Payment\PaymentWasUpdated;
 use App\Events\Payment\PaymentWasVoided;
+use App\Events\PurchaseOrder\PurchaseOrderWasMarkedSent;
 use App\Events\Quote\QuoteWasApproved;
 use App\Events\Quote\QuoteWasArchived;
 use App\Events\Quote\QuoteWasCreated;
@@ -558,6 +559,8 @@ class EventServiceProvider extends ServiceProvider
         VendorWasUpdated::class => [
             VendorUpdatedActivity::class,
         ],
+        PurchaseOrderWasMarkedSent::class => [
+        ],
 
     ];