diff --git a/app/Models/Activity.php b/app/Models/Activity.php
index b51c9b8cb9b4..777b85813a06 100644
--- a/app/Models/Activity.php
+++ b/app/Models/Activity.php
@@ -122,6 +122,13 @@ class Activity extends StaticModel
         return $this->hasOne(Backup::class);
     }
 
+
+    public function history()
+    {
+        return $this->hasOne(Backup::class);
+    }
+
+
     /**
      * @return mixed
      */
diff --git a/app/Transformers/ActivityTransformer.php b/app/Transformers/ActivityTransformer.php
index bd761bcfd1b6..0959c8d9f4f5 100644
--- a/app/Transformers/ActivityTransformer.php
+++ b/app/Transformers/ActivityTransformer.php
@@ -61,7 +61,7 @@ class ActivityTransformer extends EntityTransformer
 
     public function includeHistory(Activity $activity)
     {
-        $transformer = new ActivityTransformer($this->serializer);
+        $transformer = new InvoiceHistoryTransformer($this->serializer);
 
         return $this->includeItem($activity->backup, $transformer, Backup::class);
     }