diff --git a/app/Http/Controllers/InvoiceApiController.php b/app/Http/Controllers/InvoiceApiController.php
index 5e75f36c7a2e..c8670b055049 100644
--- a/app/Http/Controllers/InvoiceApiController.php
+++ b/app/Http/Controllers/InvoiceApiController.php
@@ -185,7 +185,7 @@ class InvoiceApiController extends BaseAPIController
         $invoice = $this->invoiceService->save($data);
         $payment = false;
 
-        if ($invoice->isInvoice()) {
+        if ($invoice->isStandard()) {
             if ($isAutoBill) {
                 $payment = $this->paymentService->autoBillInvoice($invoice);
             } elseif ($isPaid) {
diff --git a/app/Models/Invoice.php b/app/Models/Invoice.php
index ce45c8827bb2..36afcdeed62c 100644
--- a/app/Models/Invoice.php
+++ b/app/Models/Invoice.php
@@ -430,7 +430,7 @@ class Invoice extends EntityModel implements BalanceAffecting
     /**
      * @return bool
      */
-    public function isInvoice()
+    public function isStandard()
     {
         return $this->isType(INVOICE_TYPE_STANDARD) && ! $this->is_recurring;
     }
@@ -611,7 +611,7 @@ class Invoice extends EntityModel implements BalanceAffecting
 
     public function canBePaid()
     {
-        return floatval($this->balance) != 0 && ! $this->is_deleted && $this->isInvoice();
+        return floatval($this->balance) != 0 && ! $this->is_deleted && $this->isStandard();
     }
 
     public static function calcStatusLabel($status, $class, $entityType, $quoteInvoiceId)