diff --git a/includes/admin/meta-boxes/views/html-order-items.php b/includes/admin/meta-boxes/views/html-order-items.php
index ed090fae3de..d8f38329c19 100644
--- a/includes/admin/meta-boxes/views/html-order-items.php
+++ b/includes/admin/meta-boxes/views/html-order-items.php
@@ -283,7 +283,7 @@ if ( wc_tax_enabled() ) {
 				</header>
 				<article>
 					<form action="" method="post">
-						<select class="wc-product-search" multiple="multiple" style="width: 50%;" id="add_item_id" name="add_order_items" data-placeholder="<?php esc_attr_e( 'Search for a product&hellip;', 'woocommerce' ); ?>"></select>
+						<select class="wc-product-search" multiple="multiple" style="width: 50%;" id="add_item_id" name="add_order_items[]" data-placeholder="<?php esc_attr_e( 'Search for a product&hellip;', 'woocommerce' ); ?>"></select>
 					</form>
 				</article>
 				<footer>