diff --git a/includes/block-migrate/loader.php b/includes/block-migrate/loader.php
index d783bce4e97..c5de2a985d2 100644
--- a/includes/block-migrate/loader.php
+++ b/includes/block-migrate/loader.php
@@ -26,7 +26,7 @@
  */
 add_action(
 	'the_post',
-	function( WP_Post &$post ) {
+	function( WP_Post $post ) {
 		if ( ! function_exists( 'is_admin' ) || ! function_exists( 'get_current_screen' ) || is_null( get_current_screen() ) ) {
 			return;
 		}