diff --git a/app/Transformers/PurchaseOrderTransformer.php b/app/Transformers/PurchaseOrderTransformer.php
index aad2fb16b9ed..532d16d24a35 100644
--- a/app/Transformers/PurchaseOrderTransformer.php
+++ b/app/Transformers/PurchaseOrderTransformer.php
@@ -14,6 +14,7 @@ namespace App\Transformers;
 use App\Models\Backup;
 use App\Models\Vendor;
 use App\Models\Expense;
+use App\Models\Activity;
 use App\Models\Document;
 use App\Models\PurchaseOrder;
 use App\Utils\Traits\MakesHash;
@@ -31,9 +32,16 @@ class PurchaseOrderTransformer extends EntityTransformer
     protected $availableIncludes = [
         'expense',
         'vendor',
-        'history',
+        'activities',
     ];
 
+    public function includeActivities(PurchaseOrder $purchase_order)
+    {
+        $transformer = new ActivityTransformer($this->serializer);
+
+        return $this->includeCollection($purchase_order->activities, $transformer, Activity::class);
+    }
+
     public function includeInvitations(PurchaseOrder $purchase_order)
     {
         $transformer = new PurchaseOrderInvitationTransformer($this->serializer);