diff --git a/includes/admin/post-types/meta-boxes/class-wc-meta-box-order-items.php b/includes/admin/post-types/meta-boxes/class-wc-meta-box-order-items.php
index 3fc27991967..7df9a073c36 100644
--- a/includes/admin/post-types/meta-boxes/class-wc-meta-box-order-items.php
+++ b/includes/admin/post-types/meta-boxes/class-wc-meta-box-order-items.php
@@ -134,8 +134,8 @@ class WC_Meta_Box_Order_Items {
 				if ( isset( $order_item_qty[ $item_id ] ) )
 			 		woocommerce_update_order_item_meta( $item_id, '_qty', apply_filters( 'woocommerce_stock_amount', $order_item_qty[ $item_id ] ) );
 
-			 	if ( isset( $item_tax_class[ $item_id ] ) )
-			 		woocommerce_update_order_item_meta( $item_id, '_tax_class', woocommerce_clean( $item_tax_class[ $item_id ] ) );
+			 	if ( isset( $order_item_tax_class[ $item_id ] ) )
+			 		woocommerce_update_order_item_meta( $item_id, '_tax_class', woocommerce_clean( $order_item_tax_class[ $item_id ] ) );
 
 			 	if ( isset( $line_subtotal[ $item_id ] ) ) {
 			 		woocommerce_update_order_item_meta( $item_id, '_line_subtotal', woocommerce_format_decimal( $line_subtotal[ $item_id ], false ) );