diff --git a/add_domain_modal.php b/add_domain_modal.php
index 4ce360b3..323fbbd1 100644
--- a/add_domain_modal.php
+++ b/add_domain_modal.php
@@ -55,7 +55,7 @@
                 <option value="">- Vendor -</option>
                 <?php 
                 
-                $sql = mysqli_query($mysqli,"SELECT * FROM vendors WHERE vendor_archived_at NULL AND client_id = $client_id ORDER BY vendor_name ASC"); 
+                $sql = mysqli_query($mysqli,"SELECT * FROM vendors WHERE vendor_archived_at IS NULL AND client_id = $client_id ORDER BY vendor_name ASC"); 
                 while($row = mysqli_fetch_array($sql)){
                   $vendor_id = $row['vendor_id'];
                   $vendor_name = $row['vendor_name'];