diff --git a/src/wp-includes/html-api/class-wp-html-tag-processor.php b/src/wp-includes/html-api/class-wp-html-tag-processor.php
index 19cca778ea6ee..ea74410230954 100644
--- a/src/wp-includes/html-api/class-wp-html-tag-processor.php
+++ b/src/wp-includes/html-api/class-wp-html-tag-processor.php
@@ -116,7 +116,7 @@
  *
  * Example:
  *
- *     if ( $tags->next_tag( array( 'class' => 'wp-group-block' ) ) ) {
+ *     if ( $tags->next_tag( array( 'class_name' => 'wp-group-block' ) ) ) {
  *         $tags->set_attribute( 'title', 'This groups the contained content.' );
  *         $tags->remove_attribute( 'data-test-id' );
  *     }