diff --git a/app/models/Invoice.php b/app/models/Invoice.php
index 0d7687d4a8fe..09e1f887d34d 100755
--- a/app/models/Invoice.php
+++ b/app/models/Invoice.php
@@ -19,7 +19,7 @@ class Invoice extends EntityModel
 
     public function invoice_items()
     {
-        return $this->hasMany('InvoiceItem');
+        return $this->hasMany('InvoiceItem')->orderBy('id');
     }
 
     public function invoice_status()