diff --git a/classes/CommercePosTransactionBaseActions.php b/classes/CommercePosTransactionBaseActions.php
index 7caea91..9b94a01 100644
--- a/classes/CommercePosTransactionBaseActions.php
+++ b/classes/CommercePosTransactionBaseActions.php
@@ -168,7 +168,7 @@ public function setOrderCustomer($user) {
   /**
    * Adds the specified product to transaction order.
    */
-  public function addProduct($product, $quantity = 1, $combine = TRUE, $price = NULL, $line_item_type = 'product') {
+  public function addProduct($product, $quantity = 1, $combine = FALSE, $price = NULL, $line_item_type = 'product') {
     if (!in_array($product->type, CommercePosService::allowedProductTypes())) {
       return FALSE;
     }
diff --git a/includes/commerce_pos.transaction.inc b/includes/commerce_pos.transaction.inc
index 72e22ac..5509000 100644
--- a/includes/commerce_pos.transaction.inc
+++ b/includes/commerce_pos.transaction.inc
@@ -543,7 +543,7 @@ function commerce_pos_transaction_ajax_check(&$form, &$form_state) {
               $transaction->addProduct($product);
             }
             else {
-              $transaction->addProduct($product, 1, TRUE, NULL, 'commerce_pos_return');
+              $transaction->addProduct($product, 1, FALSE, NULL, 'commerce_pos_return');
             }
           }