diff --git a/app/Mail/Engine/InvoiceEmailEngine.php b/app/Mail/Engine/InvoiceEmailEngine.php
index 90809330daa3..3a160bb3d548 100644
--- a/app/Mail/Engine/InvoiceEmailEngine.php
+++ b/app/Mail/Engine/InvoiceEmailEngine.php
@@ -80,7 +80,7 @@ class InvoiceEmailEngine extends BaseEmailEngine
             ->setViewText(ctrans('texts.view_invoice'));
 
         if ($this->client->getSetting('pdf_email_attachment') !== false) {
-            $this->setAttachments($invitation->pdf_file_path());
+            $this->setAttachments($this->invoice->pdf_file_path());
         }
 
         return $this;