diff --git a/src/wp-includes/html-api/class-wp-html-processor-state.php b/src/wp-includes/html-api/class-wp-html-processor-state.php
index b7cdd347ca85b..63d531d8e7002 100644
--- a/src/wp-includes/html-api/class-wp-html-processor-state.php
+++ b/src/wp-includes/html-api/class-wp-html-processor-state.php
@@ -363,7 +363,7 @@ class WP_HTML_Processor_State {
 	 *
 	 * @see https://html.spec.whatwg.org/#concept-frag-parse-context
 	 *
-	 * @var [string, array]|null
+	 * @var array{string,array}|null
 	 */
 	public $context_node = null;