diff --git a/app/Http/Controllers/InvoiceApiController.php b/app/Http/Controllers/InvoiceApiController.php
index 066a1dadcf5d..943904228513 100644
--- a/app/Http/Controllers/InvoiceApiController.php
+++ b/app/Http/Controllers/InvoiceApiController.php
@@ -349,7 +349,7 @@ class InvoiceApiController extends BaseAPIController
 
         // Workaround to support line item taxes w/Zapier
         foreach (['tax_rate1', 'tax_name1', 'tax_rate2', 'tax_name2'] as $field) {
-            if (! empty($item['item_' . $field])) {
+            if (isset($item['item_' . $field])) {
                 $item[$field] = $item['item_' . $field];
             }
         }