diff --git a/wp-admin/includes/post.php b/wp-admin/includes/post.php
index 0ad9bcdaf0..d204f09e05 100644
--- a/wp-admin/includes/post.php
+++ b/wp-admin/includes/post.php
@@ -1738,10 +1738,12 @@ function _admin_notice_post_locked() {
 		 * Fires inside the post locked dialog before the buttons are displayed.
 		 *
 		 * @since 3.6.0
+		 * @since 5.4.0 The $user parameter was added.
 		 *
 		 * @param WP_Post $post Post object.
+		 * @param WP_User $user The user with the lock for the post.
 		 */
-		do_action( 'post_locked_dialog', $post );
+		do_action( 'post_locked_dialog', $post, $user );
 		?>
 		<p>
 		<a class="button" href="<?php echo esc_url( $sendback ); ?>"><?php echo $sendback_text; ?></a>
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 109c499ed7..9ef20cc274 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.4-alpha-47205';
+$wp_version = '5.4-alpha-47206';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.