diff --git a/wp-includes/class-wp-hook.php b/wp-includes/class-wp-hook.php
index f70be1a251..3f797098b8 100644
--- a/wp-includes/class-wp-hook.php
+++ b/wp-includes/class-wp-hook.php
@@ -189,9 +189,9 @@ final class WP_Hook implements Iterator, ArrayAccess {
 	 *
 	 * @since 4.7.0
 	 *
-	 * @param callable|bool $function_to_check Optional. The callback to check for. Default false.
 	 * @param string        $tag               Optional. The name of the filter hook. Used for building
 	 *                                         the callback ID when SPL is not available. Default empty.
+	 * @param callable|bool $function_to_check Optional. The callback to check for. Default false.
 	 * @return bool|int The priority of that hook is returned, or false if the function is not attached.
 	 */
 	public function has_filter( $tag = '', $function_to_check = false ) {
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 10ec500778..1e90b0ec5f 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.9-alpha-41550';
+$wp_version = '4.9-alpha-41551';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.