diff --git a/plugins/woocommerce/includes/wc-conditional-functions.php b/plugins/woocommerce/includes/wc-conditional-functions.php
index 070ec53b686..20383d867bb 100644
--- a/plugins/woocommerce/includes/wc-conditional-functions.php
+++ b/plugins/woocommerce/includes/wc-conditional-functions.php
@@ -261,6 +261,7 @@ if ( ! function_exists( 'is_ajax' ) ) {
 	/**
 	 * Is_ajax - Returns true when the page is loaded via ajax.
 	 *
+	 * @see wp_doing_ajax() for an equivalent function provided by WordPress since 4.7.0
 	 * @return bool
 	 */
 	function is_ajax() {